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 ('49f0b4b67efe29e7e6c684f2c79b957c', -1, 1714260955, 1714260955, '1276e345', -4, 0)

Line : 158
File : sessions.php