SAP Message R7197 - Master data tables must be converted - activate characteristics

Diagnosis
You have deleted or inserted attributes. The master data tables of thecorresponding characteristics already contained data.

System Response
The master data tables of the corresponding characteristics must beconverted.

Procedure
Activate the characteristics. Subsequently the tables, that areconverted are collected and written in one order. The transaction thenbranches to the Data Dictionary. From there you can schedule the orderas a job in the background processing and start it at once, forexample. After scheduling the job the characteristics should be activewith the new attribute structure.