diff --git a/sample-management-custom/caosdb-server/scripting/bin/sample_helpers/sample_upload_get_event.py b/sample-management-custom/caosdb-server/scripting/bin/sample_helpers/sample_upload_get_event.py
index 3bc494783c97242c432f5abbd93145499cba26f0..b726a66977be066b7e5371e03c3dfac147f28eb4 100644
--- a/sample-management-custom/caosdb-server/scripting/bin/sample_helpers/sample_upload_get_event.py
+++ b/sample-management-custom/caosdb-server/scripting/bin/sample_helpers/sample_upload_get_event.py
@@ -90,9 +90,8 @@ def add_event_to_sample(sample: db.Record, data: pd.Series) -> db.Record:
         if event.get_property(get_entity_name("start_date_prop")) is None:
             raise DataInconsistencyError(
                 f"Sample with {get_column_header_name('entity_id')} {sample.id} has an "
-                f"{get_entity_name('event_rt')} but is missing a {
-                    get_column_header_name('start_date_prop')} "
-                "which is required."
+                f"{get_entity_name('event_rt')} but is missing a "
+                f"{get_column_header_name('start_date_prop')} which is required."
             )
         if event.get_property(get_entity_name(position_prop.name)) is None:
             raise DataInconsistencyError(