          return []
  
      def as_sql(self, compiler, connection, **extra_context):
          if self.filter:
              if connection.features.supports_aggregate_filter_clause:
                  filter_sql, filter_params = self.filter.as_sql(compiler, connection)
                  template = self.filter_template % extra_context.get('template', self.template)
                  sql, params = super().as_sql(
                      compiler, connection, template=template, filter=filter_sql,
 
</s> remove             substitutions = {'function': self.function.lower(), 'expressions': sql}
 </s> add             substitutions = {'function': self.function.lower(), 'expressions': sql, 'distinct': ''} </s> remove             substitutions = {'function': 'MAX', 'expressions': '2'}
 </s> add             substitutions = {'function': 'MAX', 'expressions': '2', 'distinct': ''} </s> remove             options.update({'filter': self.filter})
 </s> add             options['filter'] = self.filter </s> remove     def __init__(self, *args, filter=None, **kwargs):
 </s> add     def __init__(self, *expressions, distinct=False, filter=None, **extra):
        if distinct and not self.allow_distinct:
            raise TypeError("%s does not allow distinct." % self.__class__.__name__)
        self.distinct = distinct
        extra_context['distinct'] = 'DISTINCT' if self.distinct else ''
          return []
  
      def as_sql(self, compiler, connection, **extra_context):
        extra_context['distinct'] = 'DISTINCT' if self.distinct else ''
          if self.filter:
              if connection.features.supports_aggregate_filter_clause:
                  filter_sql, filter_params = self.filter.as_sql(compiler, connection)
                  template = self.filter_template % extra_context.get('template', self.template)
                  sql, params = super().as_sql(
                      compiler, connection, template=template, filter=filter_sql,
keep keep add keep keep keep keep keep keep
 Fixed #28658 -- Added DISTINCT handling to the Aggregate class. 
django/db/models/aggregates.py