diff --git a/memium/source/prompt_source.py b/memium/source/prompt_source.py
index c7d6dfde..7bc3ec43 100644
--- a/memium/source/prompt_source.py
+++ b/memium/source/prompt_source.py
@@ -48,7 +48,7 @@ def _deduplicate_group(self, group: tuple[str, Sequence[BasePrompt]]) -> BasePro
             log.warning(
                 f"""{identifier} has duplicate prompts:
     Prompts:
-        {'        '.join(prompts_in_group.__repr__())}
+        {(' '*8).join(prompts_in_group.__repr__())}
 """
             )