Table '%1!s!' into which you are trying to insert, update, or delete data is currently being upgraded or initialized for ...

Table '%1!s!' into which you are trying to insert, update, or delete data is currently being upgraded or initialized for merge replication. On the publisher data modifications are disallowed until the upgrade completes and snapshot has successfully run. On subscriber data modifications are disallowed until the upgrade completes or the initial snapshot has been successfully applied and it has synchronized with the publisher.