Stack: Trouble loading CompilerPaths cache message

[dtaskoff]

Since updating to stack 2.1 on macOS, I'm getting the following output during stack build:

Trouble loading CompilerPaths cache: Control.Exception.Safe.throwString called with:
Compiler file metadata mismatch, ignoring cache
Called from:
  throwString (src/Stack/Storage.hs:492:8 in stack-2.1.1-AFL4re0D1GV4wdhlVT8Mqc:Stack.Storage)

However, the build doesn't fail.
What does the warning mean, and should I care about it, at all?

Stack version

$ stack --version
Version 2.1.1, Git revision f612ea85316bbc327a64e4ad8d9f0b150dc12d4b (7648 commits) x86_64 hpack-0.31.2

Method of installation

• Official binary, downloaded from stackage.org or fpcomplete's package repository

[dtaskoff]

2.1.3 still gives me the mentioned output.