text: from django.core.management.base import BaseCommand
  from django.db import connections
  
  
  class Command(BaseCommand):
      help = "Fixes all sequences to yield non-existing keys afterwards"
  
      def handle(self, **options):
          cursor = connections["default"].cursor()
  
          # Thanks, https://wiki.postgresql.org/wiki/Fixing_Sequences
          cursor.execute(
              """
  SELECT
   'SELECT SETVAL(' ||
   quote_literal(quote_ident(PGT.schemaname) || '.' || quote_ident(S.relname)) ||
   ', COALESCE(MAX(' ||quote_ident(C.attname)|| '), 1) ) FROM ' ||
   quote_ident(PGT.schemaname)|| '.'||quote_ident(T.relname)|| ';'
  FROM
   pg_class AS S,
   pg_depend AS D,
   pg_class AS T,
   pg_attribute AS C,
   pg_tables AS PGT
  WHERE S.relkind = 'S'
   AND S.oid = D.objid
   AND D.refobjid = T.oid
   AND D.refobjid = C.attrelid
   AND D.refobjsubid = C.attnum
   AND T.relname = PGT.tablename
  ORDER BY S.relname"""
          )
  
          statements = list(cursor)
  
          for row in statements:
              self.stdout.write(row[0])
              cursor.execute(row[0])
  