accepted satra's suggestion

pydra/engine/core.py

@@ -573,8 +573,7 @@ def _run(self, rerun=False, environment=None, **kwargs):
                 # removing the additional file with the checksum
                 (self.cache_dir / f"{self.uid}_info.json").unlink()
                 # Restore original values to inputs
-                for field_name, field_value in orig_inputs.items():
-                    setattr(self.inputs, field_name, field_value)
+                self.inputs = attr.evolve(self.inputs, **orig_inputs)
                 os.chdir(cwd)
         self.hooks.post_run(self, result)
         # Check for any changes to the input hashes that have occurred during the execution