Report the field that violated the updates to fields are forbidden constraint #20899
Description
Summary
Show at least one field/value change that violates the constraint
Motivation
one or more objects failed to apply, reason: StatefulSet.apps "postgresql" is invalid: spec: Forbidden: updates to statefulset spec for fields other than 'replicas', 'ordinals', 'template', 'updateStrategy', 'persistentVolumeClaimRetentionPolicy' and 'minReadySeconds' are forbidden (retried 5 times).
Originally posted by @headyj in #10168 (comment)
The message is technically correct, but isn't really actionable as it isn't clear what is causing it (which of the hundreds of fields made the system unhappy).
Proposal
Identify at least one field that violates the immutable fields constraint.