fix bug (#323)

# Motivation

<!-- Why is this change necessary? -->

# Content

<!-- Please include a summary of the change -->

# Testing

<!-- How was the change tested? -->

# Please check the following before marking your PR as ready for review

- [ ] I have added tests for my changes
- [ ] I have updated the documentation or added new documentation as
needed

Author: bagel897

src/codegen/sdk/core/symbol_groups/collection.py

@@ -112,7 +112,8 @@ def remove(self, value: Child | None = None, *args, **kwargs) -> None:
         # For example, let's remove all occurrences of the value instead of just the first one
         if value is None:
             super().remove(*args, **kwargs)
-        value.remove(*args, **kwargs)
+        else:
+            value.remove(*args, **kwargs)
 
     def _inserts_till(self, max_idx: int | None = None) -> int:
         """Find the number of pending inserts until max_idx."""