diff --git a/dlt/extract/hints.py b/dlt/extract/hints.py
index 49d27777d5..2aceaf5fd9 100644
--- a/dlt/extract/hints.py
+++ b/dlt/extract/hints.py
@@ -283,7 +283,7 @@ def new_table_template(
             #       and and create tables
             for column_name, column_schema in clean_columns.items():
                 if column_schema.get("container_type") is not None:
-                    clean_columns.pop(column_name)
+                    clean_columns.pop(column_name)  # type: ignore[union-attr]
 
             if not callable(clean_columns):
                 clean_columns = clean_columns.values()  # type: ignore