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 ('60c8ebb67f3856c2106e16541935cdea', -1, 1713412173, 1713412173, '1276c856', 5, 0, 0)

Line : 187
File : sessions.php