If you're running, jsr add command in your nextjs or existing project with pnpm to install the jsr registry package.
pnpm dlx jsr add @officialrajdeepsingh/slugify
You face this type of error.
➜ next-testing-app git:(main) pnpm dlx jsr add @officialrajdeepsingh/slugify
Packages: +3
+++
Progress: resolved 3, reused 3, downloaded 0, added 3, done
Setting up .npmrc...ok
Installing @officialrajdeepsingh/slugify...
$ pnpm add @officialrajdeepsingh/slugify@npm:@jsr/officialrajdeepsingh__slugify
ERR_PNPM_REGISTRIES_MISMATCH This modules directory was created using the following registries configuration: {"default":"https://registry.npmjs.org/"}. The current configuration is {"default":"https://registry.npmjs.org/","@jsr":"https://npm.jsr.io/"}. To recreate the modules directory using the new settings, run "pnpm install".
From https://medium.com/frontendweb/step-by-step-guidelines-on-how-to-publish-a-deno-package-to-the-jsr-registry-d253139d2329