The shifts didn't change although we changed the schedule of the org

Hello, we created a shift and assigned the schedule to the maintenance organization. We created multiple work orders.

Now, we created a new shift and assigned the new schedule to the maintenance organization, but when we navigated into to cost centers, the system is still taking into consideration the old shifts.

Please advise how we can resolve this…

the shifts didn't change to "MEAG Shifts", they remained "MEA Shifts".