Service &: no overall limit for unpl. services amounting to & exists

What causes this issue?

The value of the service exceeds the limit defined in the purchase
order.

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

System Response

How to fix this error?

You cannot enter the service with this value unless the limit in the
purchase order is changed accordingly.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.