add built-in field check when doing old metadata migrate (#16371)

api/commands.py

@@ -12,6 +12,7 @@ from configs import dify_config
 from constants.languages import languages
 from core.rag.datasource.vdb.vector_factory import Vector
 from core.rag.datasource.vdb.vector_type import VectorType
+from core.rag.index_processor.constant.built_in_field import BuiltInField
 from core.rag.models.document import Document
 from events.app_event import app_was_created
 from extensions.ext_database import db
@@ -559,6 +560,10 @@ def old_metadata_migration():
             if document.doc_metadata:
                 doc_metadata = document.doc_metadata
                 for key, value in doc_metadata.items():
+                    for field in BuiltInField:
+                        if field.value == key:
+                            break
+                    else:
                         dataset_metadata = (
                             db.session.query(DatasetMetadata)
                             .filter(DatasetMetadata.dataset_id == document.dataset_id, DatasetMetadata.name == key)