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 ('835ff79ced88e800b5bc6c4d79d178e3', -1, 1713906703, 1713906703, '03903087', -2, 0, 0)

Line : 187
File : sessions.php