diff --git a/src/gretel_trainer/relational/multi_table.py b/src/gretel_trainer/relational/multi_table.py
index 7f9249fb..ca6cd753 100644
--- a/src/gretel_trainer/relational/multi_table.py
+++ b/src/gretel_trainer/relational/multi_table.py
@@ -924,7 +924,7 @@ def _upload_sources_to_project(self) -> None:
             for table in self.relational_data.list_all_tables(Scope.ALL):
                 source_path = Path(self.relational_data.get_table_source(table))
                 filename = source_path.name
-                tar.add(source_path, arcname=filename)
+                tar.add(source_path, arcname=f"source_{filename}")
         self._artifact_collection.upload_source_archive(
             self._project, str(archive_path)
         )