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 ('9c1384a75c8c13fce42d7b56258f18c2', -1, 1714009758, 1714009758, '0387d5d6', 3, 0, 0)

Line : 187
File : sessions.php