Deleted Invoice but not really in Source Lines

We have a situation where an Invoice was added to an Asset as a Debit amount and all transactions to post to asset and clearing account happened as expected.      Somehow about 14 days later the invoice shows as 'Deleted' within the FA_ASSETS_INVOICE table.  The record indicates in other locates a person did this action.  The thing is within the table mentioned there is an Invoice_transaction_out_id for the invoice and the date the invoice became ineffective that matches and invoice-transaction_in_id and the date of effective.  The asset involved is the same asset so nothing 'left' the asset.  What happened is the