How to Manage Shifts
Here you can find how to manage shifts: Shift System
When you change shift times, this information is transferred to the machines and applied at the next possible time. This may be desired, but perhaps you don't want to activate the change until the next day. If you use the shift as filter criterion in the data evaluations, there can result erroneous evaluations in the transition time.
Use an appropriate moment for the transition.
For example a time without shifts.