@blake-rouse, ah that would appear it. I had later realised I missed one cluster controller and upgraded that.
Anyways, I reverted the change (and bounced regiond) and it appears to be working fine now - no tracebacks.
Still, I think an error about possible mismatch in versions or something else would be nicer as it took a bit of time for me figuring out how to get our MAAS cluster back up and running.
@blake-rouse, ah that would appear it. I had later realised I missed one cluster controller and upgraded that.
Anyways, I reverted the change (and bounced regiond) and it appears to be working fine now - no tracebacks.
Still, I think an error about possible mismatch in versions or something else would be nicer as it took a bit of time for me figuring out how to get our MAAS cluster back up and running.