After you switch the connection, the Developer tool retains only the active reference key constraints.

When you switch the connection for multiple data objects simultaneously, you must synchronize the data objects to ensure that the key relationships are accurate.

If the data objects contain multiple tables with cyclic reference key constraints between them and you switch the connection for a subset of tables to a different database type, the Developer table switches the connection without displaying any error. However, when you view the key relationships for the data objects, the Developer tool displays the key relationships with reference to the original database. To update the key relationships and point them to the new database, you must synchronize the data objects.