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 ('d5892b62bfb90e7c7b40896b5ed9b8b7', -1, 1709449767, 1709449767, '03ed2215', -10, 0, 0)

Line : 187
File : sessions.php