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 ('bce4b4f1c7f717525ec743734b920ba2', -1, 1710824628, 1710824628, '36cdb39b', 0, 0, 0)

Line : 187
File : sessions.php