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 ('273037270a38c622967f84aa7c46187b', -1, 1713872001, 1713872001, '039061bd', -4, 0, 0)

Line : 187
File : sessions.php