I have multiple workspaces and the library projects use peerDependencies and devDependencies, then the main app that imports the workspaces is in charge of getting the peerDependency.

I came across an issue where a few libraries I use store metadata within it's own module, and moduleA/node_modules/@nestjs/graphql is different than moduleB/node_modules/@nestjs/graphql when they point to the exact version in the package.json.

When I dig into the node_modules/.pnpm/registry.npmjs.org/@nestjs/graphql, I'm seeing two folders there.

.../graphql
       7.1.1_7dada01....
       7.1.1_3zDda0z....
```

Both are identical.  What causes this?

I ended up going through and randomly removing stuff and deleting my locks, etc, did an install and somehow it's fixed, but I want to know exactly why this happens so I can avoid it the next time it comes about?