diff --git a/scripts/sql/mysql/seafile.sql b/scripts/sql/mysql/seafile.sql
index ca4b5184..a136cf32 100644
--- a/scripts/sql/mysql/seafile.sql
+++ b/scripts/sql/mysql/seafile.sql
@@ -306,7 +306,8 @@ CREATE TABLE IF NOT EXISTS VirtualRepo (
   path TEXT,
   base_commit CHAR(40),
   UNIQUE INDEX(repo_id),
-  INDEX(origin_repo)
+  INDEX(origin_repo),
+  UNIQUE INDEX(origin_repo,path)
 ) ENGINE=INNODB;
 
 CREATE TABLE IF NOT EXISTS WebAP (
diff --git a/scripts/sql/sqlite/seafile.sql b/scripts/sql/sqlite/seafile.sql
index de9e40d6..e71d1f69 100644
--- a/scripts/sql/sqlite/seafile.sql
+++ b/scripts/sql/sqlite/seafile.sql
@@ -31,6 +31,7 @@ CREATE TABLE IF NOT EXISTS RepoValidSince (repo_id CHAR(37) PRIMARY KEY, timesta
 CREATE TABLE IF NOT EXISTS WebAP (repo_id CHAR(37) PRIMARY KEY, access_property CHAR(10));
 CREATE TABLE IF NOT EXISTS VirtualRepo (repo_id CHAR(36) PRIMARY KEY, origin_repo CHAR(36), path TEXT, base_commit CHAR(40));
 CREATE INDEX IF NOT EXISTS virtualrepo_origin_repo_idx ON VirtualRepo (origin_repo);
+CREATE INDEX IF NOT EXISTS virtualrepo_unique_idx ON VirtualRepo (origin_repo, path);
 CREATE TABLE IF NOT EXISTS GarbageRepos (repo_id CHAR(36) PRIMARY KEY);
 CREATE TABLE IF NOT EXISTS RepoTrash (repo_id CHAR(36) PRIMARY KEY, repo_name VARCHAR(255), head_id CHAR(40), owner_id VARCHAR(255), size BIGINT UNSIGNED, org_id INTEGER, del_time BIGINT);
 CREATE INDEX IF NOT EXISTS repotrash_owner_id_idx ON RepoTrash(owner_id);
diff --git a/scripts/upgrade/sql/8.1.0/mysql/seafile.sql b/scripts/upgrade/sql/8.1.0/mysql/seafile.sql
new file mode 100644
index 00000000..e0c9e6ce
--- /dev/null
+++ b/scripts/upgrade/sql/8.1.0/mysql/seafile.sql
@@ -0,0 +1 @@
+ALTER TABLE VirtualRepo ADD UNIQUE INDEX(origin_repo,path);
diff --git a/scripts/upgrade/sql/8.1.0/sqlite3/seafile.sql b/scripts/upgrade/sql/8.1.0/sqlite3/seafile.sql
new file mode 100644
index 00000000..8f3158ef
--- /dev/null
+++ b/scripts/upgrade/sql/8.1.0/sqlite3/seafile.sql
@@ -0,0 +1 @@
+CREATE INDEX IF NOT EXISTS "virtualrepo_unique_idx" ON "VirtualRepo" ("origin_repo", "path");
diff --git a/server/repo-mgr.c b/server/repo-mgr.c
index bbbf5256..a1046288 100644
--- a/server/repo-mgr.c
+++ b/server/repo-mgr.c
@@ -1039,8 +1039,8 @@ create_tables_mysql (SeafRepoManager *mgr)
 
     sql = "CREATE TABLE IF NOT EXISTS VirtualRepo (id BIGINT NOT NULL PRIMARY KEY AUTO_INCREMENT, "
         "repo_id CHAR(36),"
-        "origin_repo CHAR(36), path TEXT, base_commit CHAR(40), UNIQUE INDEX(repo_id), INDEX(origin_repo))"
-        "ENGINE=INNODB";
+        "origin_repo CHAR(36), path TEXT, base_commit CHAR(40), UNIQUE INDEX(repo_id), INDEX(origin_repo)), "
+	"UNIQUE INDEX(origin_repo,path) ENGINE=INNODB";
     if (seaf_db_query (db, sql) < 0)
         return -1;
 
@@ -1195,6 +1195,11 @@ create_tables_sqlite (SeafRepoManager *mgr)
     if (seaf_db_query (db, sql) < 0)
         return -1;
 
+    sql = "CREATE INDEX IF NOT EXISTS virtualrepo_unique_idx "
+        "ON VirtualRepo (origin_repo, path)";
+    if (seaf_db_query (db, sql) < 0)
+        return -1;
+
     sql = "CREATE TABLE IF NOT EXISTS GarbageRepos (repo_id CHAR(36) PRIMARY KEY)";
     if (seaf_db_query (db, sql) < 0)
         return -1;