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 ('fe9b99e962c84a3c6b39f4856a514b87', -1, 1714714944, 1714714944, '12da3d10', 7, 0)

Line : 158
File : sessions.php