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 ('4ce0c9ad5c4248cade928798971d1170', -1, 1714022295, 1714022295, '0315f82f', -4, 0, 0)

Line : 187
File : sessions.php