[🐛 Bug]: Unable to build due to duplicate identifier#931

### next-on-pages environment related information I am getting the output saying there is a duplicated identitier, but I am unable to tell where just yet. ```console ... ▲ Route (pages) Size First Load JS ▲ ┌ ○ / (2467 ms) 18.9 kB 2.35 MB ▲ ├ /_app 0 B 2.33 MB ▲ ├ ○ /404 350 B 2.33 MB ▲ └ ○ /blocked (2469 ms) 485 B 2.33 MB ▲ + First Load JS shared by all 2.39 MB ▲ ├ chunks/framework-02b8f285f75f3034.js 44.9 kB ▲ ├ chunks/main-ba668decea27f242.js 38.1 kB ▲ ├ chunks/pages/_app-7624439cb868d42d.js 2.25 MB ▲ ├ css/c02152288f9f6352.css 55.6 kB ▲ └ other shared chunks (total) 3.21 kB ▲ ▲ ƒ Middleware 85.2 kB ▲ ○ (Static) prerendered as static content ▲ Collected static files (public/, static/, .next/static): 16.924ms ▲ Build Completed in .vercel/output [2m] ⚡️ Completed `yarn dlx vercel build`. ⚡️ ERROR: A duplicated identifier has been detected in the same function file, aborting. ⚡️ Please report this at https://github.com/cloudflare/next-on-pages/issues. ``` I am assuming it's inside of the server but I really don't know, adding `DEBUG=*` did not reveal any additional information. ### Description During my next-on-pages build I am getting this error. The normal next build seems to work fine and in fact the vercel build around it works as well. ### Reproduction I am working on a reproducable way and doing some additional research. I can send you a repo and branch, although it's public I don't want to necessarily link it to this repo. ### Pages Deployment Method None ### Pages Deployment ID _No response_ ### Additional Information _No response_ ### Would you like to help? - [x] Would you like to help fixing this bug?