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 ('2078d502cef7f38d4b9a67836909b2fa', -1, 1713465890, 1713465890, '030f05b7', -4, 0, 0)

Line : 187
File : sessions.php