SAP Message UGMD_SYNCH004 - Data has not yet been synchronized; see long text

Diagnosis
You modified the source or target system for the synchronization, andthen you immediately chose Save. However, the display stillrepresented the situation according to the old source or target system.This could lead to unexpected results.

System Response
To start with, the display will be refreshed so that the situation canbe assessed more accurately. But the data will not yet be synchronized.

Procedure
To circumvent this message, always refresh the display after changingthe source or target system.
If applicable, restart the synchronization.