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 ('04603f4c2e89dc08e21c6ae4ecdd258e', -1, 1711710219, 1711710219, '22e5ef52', -10, 0, 0)

Line : 187
File : sessions.php