3817899 - Why am I receiving Duplicate Invoice Number alert on my expense report?

System popped up a red alert for "Duplicate Invoice Number", how do I know which report contains the same invoice number?

Some companies have TICKET_NUMBER field added on the entry form to record the invoice number, meanwhile, they have an audit rule set up to avoid users using same invoice to claim different expenses. When an invoice number was entered previously in an expense report, once it was added again, depends on the trigger event and the level of the audit rule, system will fire the alert to remind users or prevent users from submitting the reports.

Duplicate Invoice Number audit rule was triggered and admin wants to know which report had the same invoice number added. , KBA , CON-EXP-ADM-AUR , Audit Rules , Problem