[zzzcpan]

The purpose of UUIDs is to guarantee uniqueness without coordination within the system of computers over long enough time and within the certain rate of generating them. Hence all the timestamps and node identifiers in them, coordination on which already happened. If it doesn't guarantee uniqueness for your use case - you should change the algorithm to make sure that it does, otherwise there is no point having them if you still have to do coordination to avoid collisions.