We want to create a mixed scenario with a master V2110 SW V10 with AP39xx and a backup V9 with AP26xx. This scenario must work for a week while we migrate the AP. What happened with the existing AP26xx AP in the V10 database because the AP26xx is not supported in V10. Will the master destroy the AP 26xx in the foreign controller as well? Should we keep availability mode during the update period?