fix error

Author: jan-janssen

src/executorlib/standalone/hdf.py

@@ -1,4 +1,5 @@
 import os
+import contextlib
 from concurrent.futures import Future
 from time import sleep
 from typing import Any, Optional
@@ -33,11 +34,12 @@ def dump(file_name: Optional[str], data_dict: dict) -> None:
         os.makedirs(os.path.dirname(file_name_abs), exist_ok=True)
         with h5py.File(file_name_abs, "a") as fname:
             for data_key, data_value in data_dict.items():
-                if data_key in group_dict and "/" + group_dict[data_key] not in fname:
-                    fname.create_dataset(
-                        name="/" + group_dict[data_key],
-                        data=np.void(cloudpickle.dumps(data_value)),
-                    )
+                if data_key in group_dict:
+                    with contextlib.suppress(ValueError):
+                        fname.create_dataset(
+                            name="/" + group_dict[data_key],
+                            data=np.void(cloudpickle.dumps(data_value)),
+                        )
 
 
 def load(file_name: str) -> dict: