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 ('fe887375f5c6ff1bb23c15fa461179e4', -1, 1713505973, 1713505973, '0395e961', 7, 0, 0)

Line : 187
File : sessions.php