IntegrityError: (raised as a result of Query-invoked autoflush; consider using a session.no_autoflush block if th...

[seanh]

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IntegrityError: (raised as a result of Query-invoked autoflush; consider using a session.no_autoflush block if this flush is occurring prematurely) (psycopg2.IntegrityError) duplicate key value violates unique constraint "uq__user_group__user_id"
DETAIL:  Key (user_id, group_id)=(225407, 40059) already exists.
 [SQL: 'INSERT INTO user_group (user_id, group_id) VALUES (%(user_id)s, %(group_id)s) RETURNING user_group.id'] [parameters: {'group_id': 40059, 'user_id': 225407}]
(35 additional frame(s) were not displayed)
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  File "sqlalchemy/util/compat.py", line 202, in raise_from_cause
    reraise(type(exception), exception, tb=exc_tb, cause=cause)
  File "sqlalchemy/engine/base.py", line 1182, in _execute_context
    context)
  File "sqlalchemy/engine/default.py", line 469, in do_execute
    cursor.execute(statement, parameters)
  File "newrelic/hooks/database_psycopg2.py", line 51, in execute
    **kwargs)
  File "newrelic/hooks/database_dbapi2.py", line 25, in execute
    *args, **kwargs)