phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('cbd767f7bc84f19b8dc42dfc3942d091', -1, 1711702522, 1711702522, '22e64d43', -7, 0, 0)

Line : 187
File : sessions.php