[Fix] Subjects still dont have sources
@@ -250,7 +250,7 @@ class ChangeNode:
@property
def is_skippable(self):
- if self.instance and self.graph.source:
+ if self.instance and self.graph.source and hasattr(self.instance, 'sources'):
new_source = not self.instance.sources.filter(source=self.graph.source).exists()
else:
new_source = False
