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 ('f454eddb71bf6e8acba0251dc26b3ea1', -1, 1713408556, 1713408556, '12db8ce3', 5, 0, 0)

Line : 187
File : sessions.php