          return 'alter_%s_%s' % (self.name_lower, self.option_name)
  
  
  class AlterUniqueTogether(AlterTogetherOptionOperation):
      """
      Change the value of unique_together to the target one.
      Input value of unique_together must be a set of tuples.
      """
 
</s> remove             'AlterUniqueTogether',
            'AlterIndexTogether',
 </s> add  </s> remove             changes, 'otherapp', 0, 3, name='book',
 </s> add             changes, 'otherapp', 0, 1, name='book', </s> remove             changes, 'otherapp', 0, 4, name='book',
 </s> add             changes, 'otherapp', 0, 2, name='book', </s> remove             changes, 'otherapp', 0, 1, name='book', unique_together=set(),
        )
        self.assertOperationAttributes(
            changes, 'otherapp', 0, 2, name='book', index_together=set(),
        )
        self.assertOperationAttributes(
            changes, 'otherapp', 0, 3, name='book',
 </s> add             changes, 'otherapp', 0, 1, name='book',
    def can_reduce_through(self, operation, app_label):
        return (
            super().can_reduce_through(operation, app_label) or (
                isinstance(operation, AlterTogetherOptionOperation) and
                type(operation) is not type(self)
            )
        )

          return 'alter_%s_%s' % (self.name_lower, self.option_name)
  
    def can_reduce_through(self, operation, app_label):
        return (
            super().can_reduce_through(operation, app_label) or (
                isinstance(operation, AlterTogetherOptionOperation) and
                type(operation) is not type(self)
            )
        )

  
  class AlterUniqueTogether(AlterTogetherOptionOperation):
      """
      Change the value of unique_together to the target one.
      Input value of unique_together must be a set of tuples.
      """
keep add keep keep keep keep keep keep
 Fixed #33402 -- Optimized multiple AlterFooTogether operations. 
django/db/migrations/operations/models.py