Add explicit primary keys

members/models.py

@@ -9,6 +9,7 @@ from django.db.models import Q, OuterRef, Subquery
 class BaseMember(models.Model):
     """Abstract base model for member."""
 
+    id = models.AutoField(primary_key=True)
     first_name = models.CharField(_("First name"), max_length=127)
     last_name = models.CharField(_("Last name"), max_length=127)
     email = models.EmailField(_("Email"), unique=True)
@@ -60,6 +61,7 @@ class Payment(models.Model):
     class Meta:
         permissions = (("read_payment", "Can see payment in list"),)
 
+    id = models.AutoField(primary_key=True)
     date = models.DateTimeField(_("Date"), default=timezone.now)
     source = models.CharField(
         _("Source"),