diff --git a/api/apps/document_app.py b/api/apps/document_app.py
index 5d1531f9e..c6280c6fb 100644
--- a/api/apps/document_app.py
+++ b/api/apps/document_app.py
@@ -456,8 +456,7 @@ def run():
                     cancel_all_task_of(id)
                 else:
                     return get_data_error_result(message="Cannot cancel a task that is not in RUNNING status")
-
-            if str(req["run"]) == TaskStatus.RUNNING.value and str(doc.run) == TaskStatus.DONE.value:
+            if all([("delete" not in req or req["delete"]), str(req["run"]) == TaskStatus.RUNNING.value, str(doc.run) == TaskStatus.DONE.value]):
                 DocumentService.clear_chunk_num_when_rerun(doc.id)
 
             DocumentService.update_by_id(id, info)
@@ -683,7 +682,7 @@ def set_meta():
         meta = json.loads(req["meta"])
         if not isinstance(meta, dict):
             return get_json_result(data=False, message="Only dictionary type supported.", code=settings.RetCode.ARGUMENT_ERROR)
-        for k,v in meta.items():
+        for k, v in meta.items():
             if not isinstance(v, str) and not isinstance(v, int) and not isinstance(v, float):
                 return get_json_result(data=False, message=f"The type is not supported: {v}", code=settings.RetCode.ARGUMENT_ERROR)
     except Exception as e: