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 ('dc04cc6ee9142c60f333f1c4cb4315b9', -1, 1713972944, 1713972944, '1275b796', -7, 0, 0)

Line : 187
File : sessions.php