While in debug mode, each time I switch on/off a module (maybe even for other database-changes) the migration for the new Navigation module reruns. More specifically it is the UpdateFrom2() function that would run again, while the DataMigrationRecord for this feature has a value of 3. In these cases, there's an SqlCeException, because it wants to create the table for the Navigation which is already present in the database:
The specified table already exists. [ Navigation_MenuWidgetPartRecord ].