move the description field to the base Company model

core/models/company.py

@@ -3,6 +3,7 @@ from django.db import models
 
 class Company(models.Model):
     name = models.CharField(max_length=50)
+    description = models.TextField(blank=True)
 
     class Meta:
         abstract = True

customers/models.py

@@ -8,7 +8,6 @@ class Owner(Company):
 
 class Customer(Company):
     name = models.CharField(max_length=50)
-    description = models.TextField(blank=True)
 
     def __str__(self):
         return self.name