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 ('ad4e17f675cb81a63916f7a1c82cf677', -1, 1714375941, 1714375941, '0a020003', 1, 0, 0)

Line : 187
File : sessions.php