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 ('666cd2e2b5c8b2e8ef95e875e11bbc7d', -1, 1714707842, 1714707842, '038d1886', -4, 0)

Line : 158
File : sessions.php