This is a suggestion to revert the triggering of E_USER_DEPRECATED when using the autoIndexId option in a CreateCollection operation. The option can remain deprecated in our documentation.

Quoting create command docs:

Starting in MongoDB 4.0, you cannot set the option autoIndexId to false when creating collections in databases other than the local database.

Deprecated since version 3.2.

Comments in SERVER-8237 also suggest that there is still a valid use case for the option with non-replicated (i.e. local database) collections.

I raised similar concerns in DRIVERS-473, although it looks like they were never acknowledged before we moved ahead with PHPLIB-346.