fix(decl): Overwrite by assigning an empty list

capellambse/decl.py

@@ -228,7 +228,7 @@ def _operate_modify(
                 continue
 
         if isinstance(value, list):
-            delattr(parent, attr)
+            setattr(parent, attr, [])
             yield from _create_complex_objects(promises, parent, attr, value)
         elif isinstance(value, dict):
             obj = getattr(parent, attr)