11i Payable Accounting Error

I  void a check and cancel it corresponding invoice. To account for it , I ran the Payable Accounting Process in 11i and I got the following:

The INVOICE CANCELLATION event for invoice XXXXX  cannot be accounted because some payment event or prepayment application or unapplication event for this inv oice has not been accounted.

I checked the ap_accounting_events_all table and notice that CANNOT_ACCOUNT_FLAG = Y. I tried  updating it to NULL but it did not help.    I don't have any issues voiding/cancellng other invoices. It seems to me tha this requires data fix

Do you encounter the same issue, any suggestions?