Either it couldn’t be executed correctly after 0 retries or its execution didn’t finish after 5.00 minutes.
Underlying error: BackoffLimitExceeded: Job has reached the specified backoff limit.
This most likely an issue with its configuration/code.
Look at your job logs in order to understand if the problem comes from the job code failure or if you just need to increase its max duration timeout.
While it should allow delete, I think it’s this preventing app to be deleted.
Can you please try to set HELM_REPO_PATH redeploy the job then try to delete?