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 ('15d45b47f0b37100bbb605f10aa5ba96', -1, 1713419304, 1713419304, '127428b1', -9, 0, 0)

Line : 187
File : sessions.php