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 ('2e1fe5c45637fa801ebd4a6df5d4e8b7', -1, 1714184816, 1714184816, '038e0cf0', -10, 0, 0)

Line : 187
File : sessions.php