How to make worksheet updatable & retransfer data after a first transfer has already been done?

Scenario 1: Transfer compensation data to Core HR  > Mark assignments as processed: Yes > submit process > Back out transfer compensation data to HR process only.

Observation: Worksheet is not editable.

Scenario 2: Transfer compensation data to Core HR > Mark assignments as processed:Yes > submit process > Back out transfer compensation data to HR process only > retry transfer.

Observation: No assignments were processed.

With reference to screenshot below, we tested these 2 scenarios based on the document found on Oracle Support. However, we are still encountering issue.

Kindly advise how to make worksheet updatable & retransfer data after a first transfer has already been done.