bt5_config: Update category relation while creating sub-objects in commit tool

product/ERP5/Tool/CommitTool.py

@@ -193,8 +193,15 @@ class CommitTool (BaseTool):
                      in self.objectValues(portal_type='Business Commit')
                      if l != new_obj]
       latest_commit = max(commit_list, key=(lambda x: x.getCreationDate()))
-      # TODO: Add check for no latest_commit
+
+      if new_obj.getPortalType() == 'Business Commit':
+        # TODO: Add check for no latest_commit. Usable especially for 1st BM
         new_obj.setPredecessorValue(latest_commit)
+      else:
+        # If the new_obj is Business Snapshot, create a similar value for the
+        # latest commit
+        new_obj.setSimilarValue(latest_commit)
+        latest_commit.setSimilarValue(new_obj)
 
       return new_obj