Custom registration fields

Using b2bkings Registration Fields tool and the documentation here https://b2bkingplugin.com/docs/extended-registration-and-custom-fields/ I have created an additional registration field for my customers that I've named "Department" which is primarily meant to be used with subaccounts. This field is a text field, optional, and editable post-registration. It also has no WooCommerce Billing Field Connection, as I want it to be visible on invoices.

The field shows up and functions on the user dashboard as expected, however, when I enter a value into the field and save it, that value gets saved to every user's Department within the b2bking group, when I want it to be on an individual basis. I copied the First Name field and tweaked the variables to see if that made a difference, but that gave me the same result. I also tried entering and saving the value on both a main account and a subaccount, in different browsers just to be safe, but it duplicated the value regardless of account status.

Adding that code snippet worked like a charm, thank you Stefan!