diff --git a/ingestion/src/metadata/ingestion/source/database/common_db_source.py b/ingestion/src/metadata/ingestion/source/database/common_db_source.py
index 2033712e90b..a5da80460cb 100644
--- a/ingestion/src/metadata/ingestion/source/database/common_db_source.py
+++ b/ingestion/src/metadata/ingestion/source/database/common_db_source.py
@@ -720,7 +720,7 @@ class CommonDbSourceService(
                 table_constraints.extend(
                     constraint
                     for constraint in foreign_table_constraints
-                    if constraint not in table_constraints
+                    if constraint and constraint not in table_constraints
                 )
             else:
                 table_constraints = foreign_table_constraints