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 ('7fcdb26031a9d4a1e9cd03e0b3dfa21a', -1, 1713308864, 1713308864, '0387cae0', -10, 0, 0)

Line : 187
File : sessions.php