phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO sub_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('d61f21bfc7ea75e612ad7b79c0aab3d4', -1, 1714513620, 1714513620, '12758ef8', -2, 0, 0)

Line : 187
File : sessions.php