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 ('5fb8561ae483bb212967f830e9e15c72', -1, 1713513767, 1713513767, '0393cd9a', 2, 0, 0)

Line : 187
File : sessions.php