diff --git a/api/apps/kb_app.py b/api/apps/kb_app.py
index 99b014ea0..f7b385c11 100644
--- a/api/apps/kb_app.py
+++ b/api/apps/kb_app.py
@@ -122,7 +122,7 @@ def update():
         if not e:
             return get_data_error_result(
                 message="Database error (Knowledgebase rename)!")
-        errors = Connector2KbService.link_connectors(kb.id, [conn["id"] for conn in connectors], current_user.id)
+        errors = Connector2KbService.link_connectors(kb.id, [conn for conn in connectors], current_user.id)
         if errors:
             logging.error("Link KB errors: ", errors)
         kb = kb.to_dict()
diff --git a/api/db/services/connector_service.py b/api/db/services/connector_service.py
index daca5dd7a..5d02f058f 100644
--- a/api/db/services/connector_service.py
+++ b/api/db/services/connector_service.py
@@ -73,7 +73,9 @@ class ConnectorService(CommonService):
             return
         SyncLogsService.filter_delete([SyncLogs.connector_id==connector_id, SyncLogs.kb_id==kb_id])
         docs = DocumentService.query(source_type=f"{conn.source}/{conn.id}")
-        return FileService.delete_docs([d.id for d in docs], tenant_id)
+        err = FileService.delete_docs([d.id for d in docs], tenant_id)
+        SyncLogsService.schedule(connector_id, kb_id, reindex=True)
+        return err
 
 
 class SyncLogsService(CommonService):
@@ -226,16 +228,20 @@ class Connector2KbService(CommonService):
     model = Connector2Kb
 
     @classmethod
-    def link_connectors(cls, kb_id:str, connector_ids: list[str], tenant_id:str):
+    def link_connectors(cls, kb_id:str, connectors: list[dict], tenant_id:str):
         arr = cls.query(kb_id=kb_id)
         old_conn_ids = [a.connector_id for a in arr]
-        for conn_id in connector_ids:
+        connector_ids = []
+        for conn in connectors:
+            conn_id = conn["id"]
+            connector_ids.append(conn_id)
             if conn_id in old_conn_ids:
                 continue
             cls.save(**{
                 "id": get_uuid(),
                 "connector_id": conn_id,
-                "kb_id": kb_id
+                "kb_id": kb_id,
+                "auto_parse": conn.get("auto_parse", "1")
             })
             SyncLogsService.schedule(conn_id, kb_id, reindex=True)
 
diff --git a/common/data_source/discord_connector.py b/common/data_source/discord_connector.py
index bd64fc680..93a0477b0 100644
--- a/common/data_source/discord_connector.py
+++ b/common/data_source/discord_connector.py
@@ -63,7 +63,7 @@ def _convert_message_to_document(
         semantic_identifier=semantic_identifier,
         doc_updated_at=doc_updated_at,
         blob=message.content.encode("utf-8"),
-        extension="txt",
+        extension=".txt",
         size_bytes=len(message.content.encode("utf-8")),
     )
 
@@ -275,7 +275,7 @@ class DiscordConnector(LoadConnector, PollConnector):
                 semantic_identifier=f"{min_updated_at} -> {max_updated_at}",
                 doc_updated_at=max_updated_at,
                 blob=blob,
-                extension="txt",
+                extension=".txt",
                 size_bytes=size_bytes,
             )
 
diff --git a/common/data_source/notion_connector.py b/common/data_source/notion_connector.py
index f77184e31..8c6a522ad 100644
--- a/common/data_source/notion_connector.py
+++ b/common/data_source/notion_connector.py
@@ -1,6 +1,5 @@
 import logging
 from collections.abc import Generator
-from datetime import datetime, timezone
 from typing import Any, Optional
 from retry import retry
 
@@ -33,7 +32,7 @@ from common.data_source.utils import (
     batch_generator,
     fetch_notion_data,
     properties_to_str,
-    filter_pages_by_time
+    filter_pages_by_time, datetime_from_string
 )
 
 
@@ -293,9 +292,9 @@ class NotionConnector(LoadConnector, PollConnector):
                 blob=blob,
                 source=DocumentSource.NOTION,
                 semantic_identifier=page_title,
-                extension="txt",
+                extension=".txt",
                 size_bytes=len(blob),
-                doc_updated_at=datetime.fromisoformat(page.last_edited_time).astimezone(timezone.utc)
+                doc_updated_at=datetime_from_string(page.last_edited_time)
             )
 
         if self.recursive_index_enabled and all_child_page_ids:
diff --git a/rag/svr/sync_data_source.py b/rag/svr/sync_data_source.py
index ba63da82a..fd97a068c 100644
--- a/rag/svr/sync_data_source.py
+++ b/rag/svr/sync_data_source.py
@@ -63,6 +63,8 @@ class SyncBase:
                     if task["poll_range_start"]:
                         next_update = task["poll_range_start"]
                     for document_batch in document_batch_generator:
+                        if not document_batch:
+                            continue
                         min_update = min([doc.doc_updated_at for doc in document_batch])
                         max_update = max([doc.doc_updated_at for doc in document_batch])
                         next_update = max([next_update, max_update])