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 ('2a21dbdb3b06fb916813b57f7a3c32d9', -1, 1752932696, 1752932696, 'd849d8fb', 3, 0, 0)

Line : 189
File : sessions.php