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 ('7f6ce7d639743c7e551c4dee3ebe8667', -1, 1714002671, 1714002671, '12deb669', -10, 0, 0)

Line : 187
File : sessions.php