diff --git a/podman/domain/config.py b/podman/domain/config.py
index 631f4f57..756e97c7 100644
--- a/podman/domain/config.py
+++ b/podman/domain/config.py
@@ -81,6 +81,7 @@ def __init__(self, path: Optional[str] = None):
             self.is_default = True
         else:
             self.path = Path(path)
+            old_toml_file = None
 
         self.attrs = {}
         if self.path.exists():