Why are the question ids on the toaster odd numbers?

Question

Toaster

Hello!
Wildly interesting: why are the question ids on the toaster odd numbers?
/q/ 100889 , for example

Answer 1

because most likely the master master replication of the database is configured and so that there are no conflicts it is used in one database even, in the other not even.

Answer 2

I think that it could not have done without the "secret order of the Masons".