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 ('f3aa11ed5f3be73a5a5b7b9f54e2e26f', -1, 1713515121, 1713515121, '0395fa01', -4, 0, 0)

Line : 187
File : sessions.php