      @property
      def output_field(self):
          return ArrayField(self.source_expressions[0].output_field)
  
      def __init__(self, expression, distinct=False, **extra):
          super().__init__(expression, distinct='DISTINCT ' if distinct else '', **extra)
  
      def convert_value(self, value, expression, connection):
          if not value:
              return []
          return value
  
 
</s> remove     def __init__(self, expression, delimiter, distinct=False, **extra):
        distinct = 'DISTINCT ' if distinct else ''
        super().__init__(expression, delimiter=delimiter, distinct=distinct, **extra)
 </s> add     def __init__(self, expression, delimiter, **extra):
        super().__init__(expression, delimiter=delimiter, **extra) </s> remove         super().__init__(
            expression, distinct='DISTINCT ' if distinct else '',
            filter=filter, **extra
        )

    def _get_repr_options(self):
        return {**super()._get_repr_options(), 'distinct': self.extra['distinct'] != ''}
 </s> add         super().__init__(expression, filter=filter, **extra) </s> remove     def __init__(self, expression, distinct=False, filter=None, **extra):
 </s> add     def __init__(self, expression, filter=None, **extra):
      @property
      def output_field(self):
          return ArrayField(self.source_expressions[0].output_field)
  



      def convert_value(self, value, expression, connection):
          if not value:
              return []
          return value
  
keep keep keep keep replace replace replace keep keep keep keep keep
 Fixed #28658 -- Added DISTINCT handling to the Aggregate class. 
django/contrib/postgres/aggregates/general.py