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 ('85a2ca01fae602afbf0395882d35f4d1', -1, 1634691864, 1634691864, '22e7f315', -11, 0, 0)

Line : 187
File : sessions.php