Why is company a 'lookup' field?

In my installation (Mautic 1.2.4 on Bitnami/Digital Ocean) I find that the field Company is of type ‘lookup’. Why is that?

In my installation (Mautic 1.2.4 on Bitnami/Digital Ocean) I find that the field Company is of type ‘lookup’. Why is that?

Also, I can’t just delete it and replace it with a field that is not ‘lookup’