The system does not support validation values for the selected order type

What causes this issue?

The system does not support <LS>End Date for Scheduling</> and <LS>End
Counter for Scheduling</> values for the selected order type of the
maintenance plan.

System Response

The system deletes the <LS>End Date for Scheduling</> and <LS>End
Counter for Scheduling</> values.

Error message extract from SAP system. Copyright SAP SE.