Composer update error

Composer update error

Google leads me here.

When I run composer update, I got this:

Updating dependencies
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Root composer.json requires amasty/feed ^2.6, found amasty/feed[2.6.17] in the lock file but not in remote repositories, make sure you avoid updating this package to keep the one from the lock file.

Could you please help?