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 ('c6817a74cd37b9483fbb1a16e95b4e42', -1, 1713473147, 1713473147, '0387c631', -7, 0, 0)

Line : 187
File : sessions.php