'Brew upgrade error: ...php/8.14 is not a directory

I couldn't find any hints to this on Google, but I recently try to perform a 'brew upgrade' and I have received the following error:

 ⚓  ~  brew upgrade
==> Upgrading 6 outdated packages:
Error: /usr/local/Cellar/php/8.1.4 is not a directory

Any idea how to resolve this error?

php homebrew

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