FOP2 adds an entry in the queue_log file by using a Local channel to to so. That Local channel will generate a dummy cdr with no useful information, as it is not a real call. It has the duration of the "dummy" call, and it will not inherit nor show anything else about the real call being picked up or not.
So, it is impossible to have that dummy entry showing anything meaningful about the real call. The Local channel lives just for a few seconds and dies and nothing else. This is how asterisk works. It is not a fop2 problem or issue, it is just the way it is in asterisk.
Commenting the fop2callback file will not generate the NOTABANDON entry in queue_log and it will not fire that dummy local channel to write such line. So you won't see anything in the cdr nor in the queue_log file, just like a regular call pickup from a phone (that will log an ABANDON line in queue_log because the call was forcefully removed from the queue and not served to an agent).
There is nothing more to do, either you have the NOTABANDON and dummy CDR, or none.
Best regards,
