Accounting Entries delete journal error

Delete Journal

An unknown error when calling: DeleteJournalProof. See error log for more details.

Error Log Says:

Could not delete journal.
Inner Exception Message: System.Data.SqlClient.SqlException (0x80131904): Cannot insert duplicate key row in object 'dbo.UnusedJournalNumbers' with unique index 'IX_UnusedJournalNumber_Unique'. The duplicate key value is (xxxxxxxxxxx).
The statement has been terminated.

Accounting Entries

Contact General Ledger Support.