Reserved message class for CO XPRA MESSAGES 000-999

What causes this issue?

The message numbers of message class XPRA_MESSAGES_CO are reserved for
CO-XPRAs.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.