The dump "Field symbol has not yet been assigned" or "GETWA_NOT_ASSIGNED" in webgui UI ocurrs usually in case of client copy/system refresh.
Please try to migrate sec store entries.
Go to Tcode SECSTORE and switch to the "System data changed" tab.
Fill the following fields : "Old system name", "Old installation number" and "SAP release key" and click"Execute".
Regards,
Dinesh Subramaniyan.
Harley-Davdison SAP Basis consultant|Chennai