Order group & created

What causes this issue?

Order group &V1& has been created. It contains the numbers of the
selected orders for further processing. You can manually maintain
order group &V1& with the set maintenance function (Set &V1& for table
&V2&).

System Response

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

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.