Start and end date will no longer be determined automatically

What causes this issue?

You have changed the calculated start or end date of the service and
consequently, the system has selected the <LS>Manual Requirement Date</>
checkbox.
When this checkbox is selected, any rescheduling of the maintenance
order operation has no effect on the start and end dates during which
the service is expected to be performed.

System Response

The system does no longer update the service performance dates
automatically.

How to fix this error?

If you want the system to recalculate the start and end dates of the
service automatically with every rescheduling, deselect the <LS>Manual
Requirement Date</> checkbox and start a rescheduling of the maintenance
order operation.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.