Create Accounting for Payables

When the create accounting is run for payable subledger, one invoice belonging to Prepayment Applications event class has not been posted.

The subledger exception report lists the following cause and action plan to resolve this issue.

There are events which couldn't be processed because no data could be found in transaction objects.

Cause: Some events couldn't be processed because no data exists in the transaction objects.

Action: Enable the Diagnostics Enabled profile option, create accounting again, and submit the Accounting Event Diagnostic Report to identify the problem.

Please help me understand the root cause of this issue and the way to execute this action plan