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 ('4c3df9cb89d4f0b91ebe1cd8b3b4c4b8', -1, 1714654776, 1714654776, '0390976a', -9, 0)

Line : 158
File : sessions.php