Custom domain error

Website URL

pierogi.freehosting.dev (trying to add pierogi.uk)

Error Message

The selected custom domain is already in use on InfinityFree. If this is your custom domain, please remove it from any other accounts first.

Other Information

So earlier i was trying to add it with cname verif (i use cloudflare nameservers) and it was saying that it could not find the cname created, so i gave it some time to propogate because dns takes a while, it’s now about 3-4 hours later, and it says the domain is already in use on infinityfree. i can provide proof of domain ownership if necesarry. thank you for your time