The new options have been activated (see long text)

What causes this issue?

The processing options you set for this transaction are now in effect
for the duration of your current online session. If you want to copy
these options into your user master record, select the <LS>Options
-> Change user master</> function.

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.