Problem in accounting for an AP Invoice

Hello,

I have got one PO matched AP Invoice for which the create accounting program is unable to derive the balancing segment for one Accrual and Liability line although it derives all the segments for the remaining Accrual and Liability Lines.

I am trying to apply a manual datafix through the unique Account Derivation Rule (ADR) . However to identify the unaccounted lines I need some standard Oracle Payable Source to be included in ADR Condition set. I tried with AE_HEADER_ID and  AE_LINE_ID but not able to get a unique combination source to identify a unique AE_LINE_NUM for a common AE_HEADER_ID. Also is there a standard source to identify a Code Combination ID (CCID) for a AE_HEADER_ID ?