count_records_of_rejected=Count('id', filter=Q(last_record_system_status='rejected'))
  File "/usr/local/lib/python3.7/site-packages/django/db/models/query.py", line 379, in aggregate
    return query.get_aggregation(self.db, kwargs)
  File "/usr/local/lib/python3.7/site-packages/django/db/models/sql/query.py", line 461, in get_aggregation
    expression, col_cnt = inner_query.rewrite_cols(expression, col_cnt)
  File "/usr/local/lib/python3.7/site-packages/django/db/models/sql/query.py", line 391, in rewrite_cols
    new_expr, col_cnt = self.rewrite_cols(expr, col_cnt)
  File "/usr/local/lib/python3.7/site-packages/django/db/models/sql/query.py", line 391, in rewrite_cols
    new_expr, col_cnt = self.rewrite_cols(expr, col_cnt)
  File "/usr/local/lib/python3.7/site-packages/django/db/models/sql/query.py", line 404, in rewrite_cols
    new_expr, col_cnt = self.rewrite_cols(expr, col_cnt)
  File "/usr/local/lib/python3.7/site-packages/django/db/models/sql/query.py", line 406, in rewrite_cols
    annotation.set_source_expressions(new_exprs)
  File "/usr/local/lib/python3.7/site-packages/django/db/models/expressions.py", line 174, in set_source_expressions
    assert not exprs
AssertionError