Zend certified PHP/Magento developer

Problem with auth.json and composer update when installing amazon sales channel

Im trying to implement an extension in a Magento project (Amazon sales channel) but when I use the auth.json and I try to ‘composer update’ im getting this error.

Root composer.json requires magento/product-enterprise-edition 2.4.3, found magento/product-enterprise-edition[2.4.3] in the lock file but not in remote repositories, make sure you avoid updating this package to keep the one from the lock file.

Someone knows that it could be?