How to resolve the 'error: FIX_BY_COA() - ORA-00001: unique constraint (FUSION.GL_LEDGER_SEGMENT_VAL

I've added a new Legal Entity in the 'Manage Chart of Accounts Value Set Values', but when I tried creating a manual journal entry, the Ledger I was defaulted at was correct, but the new legal entity value is not available. in the List of Values.  By the way, before I did adding a manual journal entry i did the ff: set up

1.) Created a new entity, say entity B.

2.) Added Balancing segment to the new entity

3.) Added to a primary ledger (another entity, say entity A,  is currently assigned also to the primary ledger)

4.) Added new account to the Legal Entity via the ''Manage Chart of Accounts Value Set Values' task.