diff --git a/backend/pipeline/serializers/crud.py b/backend/pipeline/serializers/crud.py
index e14c909a3..8278d0fa2 100644
--- a/backend/pipeline/serializers/crud.py
+++ b/backend/pipeline/serializers/crud.py
@@ -89,10 +89,11 @@ def create(self, validated_data: dict[str, Any]) -> Any:
         return super().create(validated_data)
 
     def save(self, **kwargs: Any) -> Pipeline:
-        if self.validated_data[PK.CRON_STRING]:
-            self.validated_data[PK.SCHEDULED] = True
-        else:
-            self.validated_data[PK.SCHEDULED] = False
+        if PK.CRON_STRING in self.validated_data:
+            if self.validated_data[PK.CRON_STRING]:
+                self.validated_data[PK.SCHEDULED] = True
+            else:
+                self.validated_data[PK.SCHEDULED] = False
         pipeline: Pipeline = super().save(**kwargs)
         if pipeline.cron_string is None:
             SchedulerHelper.remove_job(pipeline_id=str(pipeline.id))