Caution ! Changes were carried out

What causes this issue?

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?

When you press <ZH>Enter</> you return to the hierarchy screen. Any
entries you may have made are not saved. You can process new entries in
the dialog window.

Error message extract from SAP system. Copyright SAP SE.