Problem Statement/Rationale

What is going wrong? What action would you like the Engineering team to take?
In mongosh we don't have any MongoDB identifier. We randomly generate an ID the first time the product is run and then we use that as a user id. The user id should not store the random UUID, it should store only AUID. The randomly generated UUID should be stored as an anonymous id.

To not break statistics for existing users:

We should leave all current users with the tracking they have.
for new users, we should use the field anonymousID and fill it with a random UUID.
That being said:

On startup, for new users, we generate and store a new property called anonymousId.
On startup, for users where userId already exists and anonymousId does not, we copy userId to anonymousId.
For all users, we report both properties and sometimes userId will just happen to be null.

Steps to Reproduce

How could an engineer replicate the issue you’re reporting?
Check DevTools segment statistics.

Expected Results

What do you expect to happen?
UserId is sent only for old users. New users store and send the randomly generated UUID as anonymousId.

Actual Results

What do you observe is happening?
The randomly generated UUID is sent as userId.

Additional Notes

Any additional information that may be useful to include.