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 ('a3fca32bce4a7bffc1c3988ff2c50eea', -1, 1714618288, 1714618288, '03154c00', -55, 0, 0)

Line : 187
File : sessions.php