diff --git a/backend/capellacollab/projects/toolmodels/backups/runs/interface.py b/backend/capellacollab/projects/toolmodels/backups/runs/interface.py
index 1f227250d..9dd7969b5 100644
--- a/backend/capellacollab/projects/toolmodels/backups/runs/interface.py
+++ b/backend/capellacollab/projects/toolmodels/backups/runs/interface.py
@@ -144,8 +144,8 @@ def _fetch_events_of_job_run(run: models.DatabasePipelineRun):
     ]
 
     labels = {
-        "job_name": run.reference_id,
-        "pipeline_run_id": run.id,
+        "job_name": run.reference_id or "",
+        "pipeline_run_id": str(run.id),
         "log_type": "events",
     }
 
@@ -178,8 +178,8 @@ def _fetch_logs_of_job_runs(run: models.DatabasePipelineRun):
     ]
 
     labels = {
-        "job_name": run.reference_id,
-        "pipeline_run_id": run.id,
+        "job_name": run.reference_id or "",
+        "pipeline_run_id": str(run.id),
         "log_type": "logs",
     }