--

Note: We cannot generate booking code for departments nor force them to use a company-wide unique UUID at the moment.

--

The target is to make this validation mechanism works hand-in-hand with the fallback mechanism. I.e. validation should still works when we have a colliding booking code in the fallback queue.

There 2 objectives we're aiming for:

1. Make this validation mechanism works hand-in-hand with the fallback mechanism. I.e. validation should still works when we have a colliding booking code in the fallback queue.
2. Keep the Event Sourcing System oblivious of the source of events, i.e. no prepend/append client ID to the booking code as we want different departments to be able to query each other's events using only booking code.