You are not able to modify the ‘creator’ of a data type…this is a field that is set by Bubble and you do not have access to modify it via the editor or via workflow actions.

Built-in fields

By design, Bubble adds a few fields to each type. These fields are the ‘Created Date’ and the ‘Modified Date’ of type date. For things that aren’t users, a third field is ‘Creator’, which is of field type User. For each thing that isn’t a User, this field will link it to the user that was logged in when the thing was created (see below the few actions that let you create things). Every thing also has a ‘slug’, which is a shorthand, unique way to refer to a thing that can be used, for example, in URLs (see this article).

Each thing in Bubble also gets a unique ID assigned when it gets created - this has the format of a long string of seemingly random numbers with an “x” in the middle. Using this field isn’t common, but in some cases, if you need a way to uniquely identify a thing, you can use the ‘unique id’ field.

Instead of these fields yourself, you can rely on Bubble’s data engine to create these fields, assign the right data when a thing is created, and use that data where you need it.

There is not anyway that I am aware of that you can modify these built in fields.

Instead what you can do is add another field to your data type…that field would be of type User…then you can modify that as you would please…of course you won’t be able to use the operator ‘things creator’ but instead would just reference ‘things user’ (if you name the user field type to be field)