SAP Message AD379 - Key fields were changed/renamed. Please convert DB table/data

Diagnosis
The table structure has changed. Key fields have been added or deleted,the order of key fields has changed or fields in the table key havebeen renamed. Therefore, activation of the table has been cancelled.
You must adjust the database table for a TRANSP-type table and convertany existing data. Existing data in POOL/CLUSTER type tables must alsobe converted.

Procedure
Use the 'Online conversion' function to convert a TRANSP type table(i.e. activate the ABAP/4 Dictionary table, adjust the database table,and convert any existing data) and to convert data for aPOOL/CLUSTER-type table.
INCLUDE ADIC-DB-UTILITIES
INCLUDE ADIC-UPDATEFORCE