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 ('0a9eb09ac111b61901f2ecbaeeae92c7', -1, 1712949892, 1712949892, '03eeaebf', -8, 0, 0)

Line : 187
File : sessions.php