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 ('7db42510b431d6a2c3b35c051aa360ed', -1, 1730418776, 1730418776, '12de3018', 20, 0, 0)

Line : 195
File : sessions.php