Recommendation for group restart in coexistence

If a group restart is necessary while the data sharing group is running in a coexistence environment, issue the START command only for Db2 12 members.

Do not start the Db2 11 members until the Db2 12 members have completed forward log recovery. If a Db2 11 member performs the group restart for a Db2 12 member, Db2 11 adds pages to the logical page list during the peer-forward recovery phase when it tries to apply redo log records against a release-dependent object.