User field remains empty for anonymous user

Hi everyone

I’m quite new to bubble and I’m trying to do kind of an online calculator.

What I try to achieve:
When a (not logged in) visitor fills out the form and starts the calculation, I save the data in my “Calculation” table. By default from the system there is a field User. However, this field remains empty for all the entries that are written. What do I need to do, that the anonymous temporary user is stored in there?

I also tried to add an additional field “Owner” and store the current user in the workflow, but also this field remains empty.

Thanks in advance for any advices!

If the user are not logged, the current user will not be stored. You can create any field and request to store what do you want without login but these data will not associated an user.