Staging tables of the migration object are locked for data transfer

What causes this issue?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

Editing data records is not allowed for these staging tables.

How to fix this error?

Finish the data transfer, or click Restart Transfer on the Migration
Object Details screen to reset the transfer status and unlock the
staging tables.
You can then edit the data records of the staging tables.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.