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 ('96d2e10c1b663f14f64ed96515d36f60', -1, 1714029332, 1714029332, '0390bdb1', -10, 0, 0)

Line : 187
File : sessions.php