Crash při ručním přidávání účastníka do soutěže

Client:    85.160.6.238
Method:    POST
Path:      /org/contest/c/6380/participants/new
Referrer:  https://osmo.matematickaolympiada.cz/org/contest/c/6380/participants/new

Traceback (most recent call last):
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/sqlalchemy/engine/base.py", line 1900, in _execute_context
    self.dialect.do_execute(
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/sqlalchemy/engine/default.py", line 732, in do_execute
    cursor.execute(statement, parameters)
psycopg2.errors.UniqueViolation: duplicate key value violates unique constraint "users_email_key"
DETAIL:  Key (email)=(matej.moravek@gymst.eu) already exists.


The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/flask/app.py", line 2525, in wsgi_app
    response = self.full_dispatch_request()
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/flask/app.py", line 1822, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/flask/app.py", line 1820, in full_dispatch_request
    rv = self.dispatch_request()
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/flask/app.py", line 1796, in dispatch_request
    return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/mo/web/org_contest.py", line 1844, in org_contest_add_user
    user, is_new_user, is_change_user_to_org = mo.users.find_or_create_user(form.email.data, form.first_name.data, form.last_name.data, False, reason='web')
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/mo/users.py", line 107, in find_or_create_user
    sess.flush()    # Aby uživatel dostal user_id
  File "<string>", line 2, in flush
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/sqlalchemy/orm/session.py", line 3383, in flush
    self._flush(objects)
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/sqlalchemy/orm/session.py", line 3523, in _flush
    transaction.rollback(_capture_exception=True)
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/sqlalchemy/util/langhelpers.py", line 70, in __exit__
    compat.raise_(
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/sqlalchemy/util/compat.py", line 208, in raise_
    raise exception
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/sqlalchemy/orm/session.py", line 3483, in _flush
    flush_context.execute()
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/sqlalchemy/orm/unitofwork.py", line 456, in execute
    rec.execute(self)
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/sqlalchemy/orm/unitofwork.py", line 630, in execute
    util.preloaded.orm_persistence.save_obj(
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/sqlalchemy/orm/persistence.py", line 245, in save_obj
    _emit_insert_statements(
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/sqlalchemy/orm/persistence.py", line 1238, in _emit_insert_statements
    result = connection._execute_20(
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/sqlalchemy/engine/base.py", line 1705, in _execute_20
    return meth(self, args_10style, kwargs_10style, execution_options)
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/sqlalchemy/sql/elements.py", line 333, in _execute_on_connection
    return connection._execute_clauseelement(
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/sqlalchemy/engine/base.py", line 1572, in _execute_clauseelement
    ret = self._execute_context(
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/sqlalchemy/engine/base.py", line 1943, in _execute_context
    self._handle_dbapi_exception(
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/sqlalchemy/engine/base.py", line 2124, in _handle_dbapi_exception
    util.raise_(
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/sqlalchemy/util/compat.py", line 208, in raise_
    raise exception
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/sqlalchemy/engine/base.py", line 1900, in _execute_context
    self.dialect.do_execute(
  File "/aux/akce/mo/osmo/venv/lib/python3.9/site-packages/sqlalchemy/engine/default.py", line 732, in do_execute
    cursor.execute(statement, parameters)
sqlalchemy.exc.IntegrityError: (psycopg2.errors.UniqueViolation) duplicate key value violates unique constraint "users_email_key"
DETAIL:  Key (email)=(matej.moravek@gymst.eu) already exists.

[SQL: INSERT INTO users (email, first_name, last_name, is_org, last_login_at, reset_at) VALUES (%(email)s, %(first_name)s, %(last_name)s, %(is_org)s, %(last_login_at)s, %(reset_at)s) RETURNING users.user_id]
[parameters: {'email': 'matej.moravek@gymst.eu', 'first_name': 'Matěj', 'last_name': 'Morávek', 'is_org': False, 'last_login_at': None, 'reset_at': None}]
(Background on this error at: https://sqlalche.me/e/14/gkpj)