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 ('463b9a50d4d1669979b82ac422ff6670', -1, 1711625531, 1711625531, '0351de98', -11, 0, 0)

Line : 187
File : sessions.php