Krill continues to try to synchronize old parents after their removal

[TheEnbyperor]

I'm seeing a lot of errors like this in my Krill logs:

2024-08-23 09:38:33 [INFO] Synchronize CA 'as207960-rpki-ca' with its parent 'ORG-QM6-RIPE'
2024-08-23 09:38:33 [ERROR] Failed to synchronize CA 'as207960-rpki-ca' with its parent 'ORG-QM6-RIPE'. Will reschedule to: '2024-08-23T08:43:33+00:00'. Error: CA 'as207960-rpki-ca' does not have a parent named 'ORG-QM6-RIPE'

This parent used to exist, and I'm presuming the resync was scheduled when it still existed, but was first actioned after it was deleted. I think in this case Krill should not try and reschedule the sync as it will be rescheduling the task forever.