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 ('69be1afeabec621156b92be6eb3640ab', -1, 1711688079, 1711688079, '23afe8a3', 3, 0, 0)

Line : 187
File : sessions.php