In this case, there are three ways:
1) Make a connection with comapany No company = models.ForeignKey('Company',null=True) required company = models.ForeignKey('Company',null=True)
2) Add a default company and specify it as the default value for the foreign key field company = models.ForeignKey('Company',default=1) #where 1 is the identifier of the created company
3) Leave the model code as is. Add a fake company for a superuser named, for example, "Superusercompany" set it in the create_superuser method.
UPD: according to your comment 3 will be the best solution so as not to violate your bush logic.
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