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 ('ce7eabc952b66c6a1e78db2c4fb63adf', -1, 1714605129, 1714605129, '03951bca', -50, 0, 0)

Line : 187
File : sessions.php