Given the following configuration (see Postman in attachments):

1. create bridge domain
2. assign an interface to bridge domain
3. create l2-fib entry

When I try to update the l2-fib entry by PUTting the entire bridge domain, with just the fib entry modified, and the new entry is invalid (such as referencing a non-existing interface)... then the request fails, but the old L2-fib entry is not restored in operational data.