diff --git a/apps/knowledge/serializers/document.py b/apps/knowledge/serializers/document.py
index af6860e2fed..196585e22ef 100644
--- a/apps/knowledge/serializers/document.py
+++ b/apps/knowledge/serializers/document.py
@@ -662,6 +662,7 @@ def cancel(self, instance, with_valid=True):
 
         @transaction.atomic
         def delete(self):
+            self.is_valid(raise_exception=True)
             document_id = self.data.get("document_id")
             source_file_ids = [
                 doc['meta'].get(