Why does information in Nowsta not match information in Caterease?

Mismatch Error. Mismatch Errors happen when Nowsta isn’t sure about the desired outcome of a change request. 

For example, imagine an event is transferred to Nowsta. After it’s been transferred, a coordinator then edits a field within Nowsta (let’s say the start time of the event). If the event is then transferred to Nowsta again from Caterease, the field that has been edited will remain the same and will not update to match what is in Caterease.

The field in Caterease does not transfer to Nowsta. See here for a list of how fields map between Caterease and Nowsta.