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 ('e59b682e5f2e8a4a86297ee0e4100e84', -1, 1713869668, 1713869668, '03ee7582', -8, 0, 0)

Line : 187
File : sessions.php