An object that was specified with a drop‑related action, such as DROP_RETAIN or DROP_UNDO, is missing from the deployment plan summary for the specified environment. The system cannot validate the action because the object does not appear in the evaluated plan.
System action
The system reports a validation error and stops the deployment plan creation.
User response
Verify that the object marked with the specified action is present in the request with correct identifiers (schema, object name, type) and environment details. Confirm that the object appears in the targetOutOfBandChangeList returned from the API and that it is within the release scope. Correct the request and retry deployment plan creation.