uplicate key value violates unique constraint "django_content_type_app_label_model_76bd3d3b_uniq" code example
Example: duplicate key value violates unique constraint "django_migrations_pkey"
from django.db import connections
query = "SELECT setval('django_migrations_id_seq', (SELECT MAX(id) FROM django_migrations))"
cursor = connections['default'].cursor()
cursor.execute(query)
row = cursor.fetchone()