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 ('291aaea1d7c0c8b363b6f26e0a8d2f6d', -1, 1714705701, 1714705701, '03915ddd', -8, 0)

Line : 158
File : sessions.php