diff --git a/docs/DataModels/DevLakeDomainLayerSchema.md b/docs/DataModels/DevLakeDomainLayerSchema.md
index 484f431fdc7..b8127018fd9 100644
--- a/docs/DataModels/DevLakeDomainLayerSchema.md
+++ b/docs/DataModels/DevLakeDomainLayerSchema.md
@@ -310,7 +310,7 @@ A ref is the abstraction of a branch or tag.
 | `name`       | varchar  | 255        | The name of the ref. E.g. '[refs/tags/v0.9.3](https://github.com/apache/incubator-devlake/tree/v0.9.3)' or 'origin/main'                                                                                                                                                                                                                                    |             |
 | `repo_id`    | varchar  | 255        | The id of repo this ref belongs to                                                                                                                                                                                                                                                                                                                          | FK_repos.id |
 | `commit_sha` | char     | 40         | The commit this ref points to at the time of collection                                                                                                                                                                                                                                                                                                     |             |
-| `is_default` | tinyint  | 1          | <ul><li>0: the ref is the default branch. By the definition of [Github](https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/managing-branches-in-your-repository/changing-the-default-branch), the default branch is the base branch for pull requests and code commits.</li><li>1: not the default branch</li></ul> |             |
+| `is_default` | tinyint  | 1          | <ul><li>0: not the default branch</li><li>1: the ref is the default branch. By the definition of [Github](https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/managing-branches-in-your-repository/changing-the-default-branch), the default branch is the base branch for pull requests and code commits.</li></ul> |             |
 | `ref_type`   | varchar  | 64         | There are 2 typical types:<ul><li>BRANCH</li><li>TAG</li></ul>                                                                                                                                                                                                                                                                                              |             |
 
 #### commits_diffs
diff --git a/versioned_docs/version-v0.15/DataModels/DevLakeDomainLayerSchema.md b/versioned_docs/version-v0.15/DataModels/DevLakeDomainLayerSchema.md
index 3239c59b1a4..4addd111a5c 100644
--- a/versioned_docs/version-v0.15/DataModels/DevLakeDomainLayerSchema.md
+++ b/versioned_docs/version-v0.15/DataModels/DevLakeDomainLayerSchema.md
@@ -258,7 +258,7 @@ A ref is the abstraction of a branch or tag.
 | `ref_name`   | varchar  | 255        | The name of ref. Eg. '[refs/tags/v0.9.3](https://github.com/apache/incubator-devlake/tree/v0.9.3)'                                                                                                                                                                                                                                                          |             |
 | `repo_id`    | varchar  | 255        | The id of repo this ref belongs to                                                                                                                                                                                                                                                                                                                          | FK_repos.id |
 | `commit_sha` | char     | 40         | The commit this ref points to at the time of collection                                                                                                                                                                                                                                                                                                     |             |
-| `is_default` | int      |            | <ul><li>0: the ref is the default branch. By the definition of [Github](https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/managing-branches-in-your-repository/changing-the-default-branch), the default branch is the base branch for pull requests and code commits.</li><li>1: not the default branch</li></ul> |             |
+| `is_default` | tinyint  | 1          | <ul><li>0: not the default branch</li><li>1: the ref is the default branch. By the definition of [Github](https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/managing-branches-in-your-repository/changing-the-default-branch), the default branch is the base branch for pull requests and code commits.</li></ul> |             |
 | `merge_base` | char     | 40         | The merge base commit of the main ref and the current ref                                                                                                                                                                                                                                                                                                   |             |
 | `ref_type`   | varchar  | 64         | There're 2 typical types:<ul><li>BRANCH</li><li>TAG</li></ul>                                                                                                                                                                                                                                                                                               |             |
 
diff --git a/versioned_docs/version-v0.16/DataModels/DevLakeDomainLayerSchema.md b/versioned_docs/version-v0.16/DataModels/DevLakeDomainLayerSchema.md
index 9cf81ea9853..58bc5439a6d 100644
--- a/versioned_docs/version-v0.16/DataModels/DevLakeDomainLayerSchema.md
+++ b/versioned_docs/version-v0.16/DataModels/DevLakeDomainLayerSchema.md
@@ -242,7 +242,7 @@ A ref is the abstraction of a branch or tag.
 | `name`   | varchar  | 255        | The name of the ref. E.g. '[refs/tags/v0.9.3](https://github.com/apache/incubator-devlake/tree/v0.9.3)' or 'origin/main'                                                                                                                                                                                                                                                          |             |
 | `repo_id`    | varchar  | 255        | The id of repo this ref belongs to                                                                                                                                                                                                                                                                                                                          | FK_repos.id |
 | `commit_sha` | char     | 40         | The commit this ref points to at the time of collection                                                                                                                                                                                                                                                                                                     |             |
-| `is_default` | tinyint  | 1          | <ul><li>0: the ref is the default branch. By the definition of [Github](https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/managing-branches-in-your-repository/changing-the-default-branch), the default branch is the base branch for pull requests and code commits.</li><li>1: not the default branch</li></ul>|             |
+| `is_default` | tinyint  | 1          | <ul><li>0: not the default branch</li><li>1: the ref is the default branch. By the definition of [Github](https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/managing-branches-in-your-repository/changing-the-default-branch), the default branch is the base branch for pull requests and code commits.</li></ul> |             |
 | `ref_type`   | varchar  | 64         | There are 2 typical types:<ul><li>BRANCH</li><li>TAG</li></ul>                                                                                                                                                                                                                                                                                               |             |
 
 #### commits_diffs
diff --git a/versioned_docs/version-v0.17/DataModels/DevLakeDomainLayerSchema.md b/versioned_docs/version-v0.17/DataModels/DevLakeDomainLayerSchema.md
index 4f58663a579..089afedadf1 100644
--- a/versioned_docs/version-v0.17/DataModels/DevLakeDomainLayerSchema.md
+++ b/versioned_docs/version-v0.17/DataModels/DevLakeDomainLayerSchema.md
@@ -241,7 +241,7 @@ A ref is the abstraction of a branch or tag.
 | `name`       | varchar  | 255        | The name of the ref. E.g. '[refs/tags/v0.9.3](https://github.com/apache/incubator-devlake/tree/v0.9.3)' or 'origin/main'                                                                                                                                                                                                                                    |             |
 | `repo_id`    | varchar  | 255        | The id of repo this ref belongs to                                                                                                                                                                                                                                                                                                                          | FK_repos.id |
 | `commit_sha` | char     | 40         | The commit this ref points to at the time of collection                                                                                                                                                                                                                                                                                                     |             |
-| `is_default` | tinyint  | 1          | <ul><li>0: the ref is the default branch. By the definition of [Github](https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/managing-branches-in-your-repository/changing-the-default-branch), the default branch is the base branch for pull requests and code commits.</li><li>1: not the default branch</li></ul> |             |
+| `is_default` | tinyint  | 1          | <ul><li>0: not the default branch</li><li>1: the ref is the default branch. By the definition of [Github](https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/managing-branches-in-your-repository/changing-the-default-branch), the default branch is the base branch for pull requests and code commits.</li></ul> |             |
 | `ref_type`   | varchar  | 64         | There are 2 typical types:<ul><li>BRANCH</li><li>TAG</li></ul>                                                                                                                                                                                                                                                                                              |             |
 
 #### commits_diffs
diff --git a/versioned_docs/version-v0.18/DataModels/DevLakeDomainLayerSchema.md b/versioned_docs/version-v0.18/DataModels/DevLakeDomainLayerSchema.md
index f1f877e786d..bf29dcc01b6 100644
--- a/versioned_docs/version-v0.18/DataModels/DevLakeDomainLayerSchema.md
+++ b/versioned_docs/version-v0.18/DataModels/DevLakeDomainLayerSchema.md
@@ -274,7 +274,7 @@ A ref is the abstraction of a branch or tag.
 | `name`       | varchar  | 255        | The name of the ref. E.g. '[refs/tags/v0.9.3](https://github.com/apache/incubator-devlake/tree/v0.9.3)' or 'origin/main'                                                                                                                                                                                                                                    |             |
 | `repo_id`    | varchar  | 255        | The id of repo this ref belongs to                                                                                                                                                                                                                                                                                                                          | FK_repos.id |
 | `commit_sha` | char     | 40         | The commit this ref points to at the time of collection                                                                                                                                                                                                                                                                                                     |             |
-| `is_default` | tinyint  | 1          | <ul><li>0: the ref is the default branch. By the definition of [Github](https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/managing-branches-in-your-repository/changing-the-default-branch), the default branch is the base branch for pull requests and code commits.</li><li>1: not the default branch</li></ul> |             |
+| `is_default` | tinyint  | 1          | <ul><li>0: not the default branch</li><li>1: the ref is the default branch. By the definition of [Github](https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/managing-branches-in-your-repository/changing-the-default-branch), the default branch is the base branch for pull requests and code commits.</li></ul> |             |
 | `ref_type`   | varchar  | 64         | There are 2 typical types:<ul><li>BRANCH</li><li>TAG</li></ul>                                                                                                                                                                                                                                                                                              |             |
 
 #### commits_diffs
diff --git a/versioned_docs/version-v0.19/DataModels/DevLakeDomainLayerSchema.md b/versioned_docs/version-v0.19/DataModels/DevLakeDomainLayerSchema.md
index e909227d6b8..52d75dbf114 100644
--- a/versioned_docs/version-v0.19/DataModels/DevLakeDomainLayerSchema.md
+++ b/versioned_docs/version-v0.19/DataModels/DevLakeDomainLayerSchema.md
@@ -284,7 +284,7 @@ A ref is the abstraction of a branch or tag.
 | `name`       | varchar  | 255        | The name of the ref. E.g. '[refs/tags/v0.9.3](https://github.com/apache/incubator-devlake/tree/v0.9.3)' or 'origin/main'                                                                                                                                                                                                                                    |             |
 | `repo_id`    | varchar  | 255        | The id of repo this ref belongs to                                                                                                                                                                                                                                                                                                                          | FK_repos.id |
 | `commit_sha` | char     | 40         | The commit this ref points to at the time of collection                                                                                                                                                                                                                                                                                                     |             |
-| `is_default` | tinyint  | 1          | <ul><li>0: the ref is the default branch. By the definition of [Github](https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/managing-branches-in-your-repository/changing-the-default-branch), the default branch is the base branch for pull requests and code commits.</li><li>1: not the default branch</li></ul> |             |
+| `is_default` | tinyint  | 1          | <ul><li>0: not the default branch</li><li>1: the ref is the default branch. By the definition of [Github](https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/managing-branches-in-your-repository/changing-the-default-branch), the default branch is the base branch for pull requests and code commits.</li></ul> |             |
 | `ref_type`   | varchar  | 64         | There are 2 typical types:<ul><li>BRANCH</li><li>TAG</li></ul>                                                                                                                                                                                                                                                                                              |             |
 
 #### commits_diffs
diff --git a/versioned_docs/version-v0.20/DataModels/DevLakeDomainLayerSchema.md b/versioned_docs/version-v0.20/DataModels/DevLakeDomainLayerSchema.md
index f04d9615eff..9f31e26b978 100644
--- a/versioned_docs/version-v0.20/DataModels/DevLakeDomainLayerSchema.md
+++ b/versioned_docs/version-v0.20/DataModels/DevLakeDomainLayerSchema.md
@@ -307,7 +307,7 @@ A ref is the abstraction of a branch or tag.
 | `name`       | varchar  | 255        | The name of the ref. E.g. '[refs/tags/v0.9.3](https://github.com/apache/incubator-devlake/tree/v0.9.3)' or 'origin/main'                                                                                                                                                                                                                                    |             |
 | `repo_id`    | varchar  | 255        | The id of repo this ref belongs to                                                                                                                                                                                                                                                                                                                          | FK_repos.id |
 | `commit_sha` | char     | 40         | The commit this ref points to at the time of collection                                                                                                                                                                                                                                                                                                     |             |
-| `is_default` | tinyint  | 1          | <ul><li>0: the ref is the default branch. By the definition of [Github](https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/managing-branches-in-your-repository/changing-the-default-branch), the default branch is the base branch for pull requests and code commits.</li><li>1: not the default branch</li></ul> |             |
+| `is_default` | tinyint  | 1          | <ul><li>0: not the default branch</li><li>1: the ref is the default branch. By the definition of [Github](https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/managing-branches-in-your-repository/changing-the-default-branch), the default branch is the base branch for pull requests and code commits.</li></ul> |             |
 | `ref_type`   | varchar  | 64         | There are 2 typical types:<ul><li>BRANCH</li><li>TAG</li></ul>                                                                                                                                                                                                                                                                                              |             |
 
 #### commits_diffs