Expense report did not go through Manager's approval and was paid bypassing the approver's approval

Hello,

Expense report did not go through Manager's approval and was paid bypassing the approver's approval. This year we had two of such employee's expense report which did not go through the approver's approval and was paid the following day. Has anyone faced the same issue? If so, can you please let us know how did you fix it?

There were IB errors when we checked the IB logs immediately after the expense report was submitted.

[2018-02-23T14:27:46.409 SubConProcess] - - - (3) File:
/vob/peopletools/src/pspcm/pcmobuf.cppSQL error. Stmt #: 6249  Error Position: 0  Return: 8601 - [IBM][CLI Driver][DB2] SQL0913N  Unsuccessful execution of a distributed