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) VALUES ('18402fe89f0f7c2d001204a4d7c9fb79', -1, 1714639216, 1714639216, '0381171e', 7, 0)

Line : 158
File : sessions.php