already being discussed:

This is straight out of the 8k

the Company has determined that it is appropriate to accrue expense in the first quarter 2023 related to a potential new collective bargaining agreement with employees represented by the Air Line Pilots Association. This accrual represents a shift in the timing of the associated expense from the second quarter 2023 into the first quarter 2023.

Probably has to do with retro, even though we know it won’t actually get paid out in Q1.