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 ('6177f3a1643ff49feb7beaf00a10b00f', -1, 1714030683, 1714030683, '12d9d048', 6, 0, 0)

Line : 187
File : sessions.php