Hi,
In table T770MATTR (sm30), for attribute ADDR_SHIPT, it has inheritance type as 'local values overwrites inherited vaues'.
So when you add a new value and the original value is with inherited indicator, the new one will overwrite the old one which is correct.
If the old value is marked as inherited, you should be able to find the old value in upper node of the user, such as the assigned organization.
BR,
Ivy