SAP Message AD386 - Table type change. Please check if data conversion is required

Diagnosis The table type has changed from CLUSTER to POOL. For performancereasons no check was made to see whether the cluster table containeddata. Procedure Find out whether the table contains data. If there is no data in thetable, you can execute the 'Force activation' function. If data doesexist, use the DB utility in the ABAP/4 Dictionary to activate andconvert the table.