Scaling into Europe is a headache when your site starts cannibalizing itself....

https://elevatedigital.hk/blog/challenges-of-running-successful-seo-campaigns-in-the-european-market-4565

Scaling into Europe is a headache when your site starts cannibalizing itself. We’ve all seen the traffic drop after a messy migration, usually because hreflang tags are broken across subdirectories