Condition of Parent Id Without Merge Commit Added

packages/mermaid/src/diagrams/git/gitGraphAst.js

@@ -277,19 +277,17 @@ export const cherryPick = function (sourceId, targetId, tag, parentCommitId) {
   }
   let sourceCommit = commits[sourceId];
   let sourceCommitBranch = sourceCommit.branch;
-  if (sourceCommit.type === commitType.MERGE) {
-    if (!parentCommitId) {
-      let error = new Error(
-        'Incorrect usage of cherry-pick: If the source commit is a merge commit, an immediate parent commit must be specified.'
-      );
-      throw error;
-    }
-    if (!(Array.isArray(sourceCommit.parents) && sourceCommit.parents.includes(parentCommitId))) {
-      let error = new Error(
-        'Invalid operation: The specified parent commit is not an immediate parent of the cherry-picked commit.'
-      );
-      throw error;
-    }
+  if (!(Array.isArray(sourceCommit.parents) && sourceCommit.parents.includes(parentCommitId))) {
+    let error = new Error(
+      'Invalid operation: The specified parent commit is not an immediate parent of the cherry-picked commit.'
+    );
+    throw error;
+  }
+  if (sourceCommit.type === commitType.MERGE && !parentCommitId) {
+    let error = new Error(
+      'Incorrect usage of cherry-pick: If the source commit is a merge commit, an immediate parent commit must be specified.'
+    );
+    throw error;
   }
   if (!targetId || commits[targetId] === undefined) {
     // cherry-pick source commit to current branch