Fix: validation of readonly fields. (#6144)

### What problem does this PR solve?

#6104

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

api/utils/api_utils.py

@@ -347,6 +347,11 @@ def valid_parameter(parameter, valid_values):
         return get_error_data_result(f"'{parameter}' is not in {valid_values}")
 
 
+def dataset_readonly_fields(field_name):
+    return field_name in ["chunk_count", "create_date", "create_time", "update_date", "update_time",
+                          "created_by", "document_count", "token_num", "status", "tenant_id", "id"]
+
+
 def get_parser_config(chunk_method, parser_config):
     if parser_config:
         return parser_config