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 ('c1526b6d47bc6e2582a3b00861be742c', -1, 1713468019, 1713468019, '03104c2b', -4, 0, 0)

Line : 187
File : sessions.php