I'm unable to delete SQL AG getting following error
"error deleting availability groups - status code:1953 unable to delete the asset.Backup images exists for image."
Is it beacause backup imagesexists in catalog ?
while the status code 1953 refers to what you mentioned, but it should not be for your case.
did you remove the availability group from all policies?(instance and database tab in the policy.
it's not checked in any backup policies ,it was earlier, now SQL team change name of the Availability group
But old backup images are still valid in catalog until retention is over