Warning: These settings are valid in all clients

What causes this issue?

If you change the SAPscript settings, this affects the cross-client
tables. This message is intended to draw your attention to the fact
that changes to the settings are effective system-wide in all other
clients as well.

System Response

You have the authorization required to carry out cross-client
maintenance.

How to fix this error?

Please note that such changes should be planned and coordinated in the
context of all clients within the system.

Error message extract from SAP system. Copyright SAP SE.