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 ('76b5ac0948b7b6ec65ee28ab0c047463', -1, 1713504504, 1713504504, '038d1ea2', -4, 0, 0)

Line : 187
File : sessions.php