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 ('7912b13711438629cc9a2cbf5b0a2874', -1, 1713408934, 1713408934, '12df6a64', -2, 0, 0)

Line : 187
File : sessions.php