The selected domain is already in use on resource1demo com. Please remove the domain from your account at resource1demo com before you can host it on InfinityFree.
Previously the site was hosted on byet org is that the issue please help
I’m sorry, but what is your question exactly? The issue seems quite clear to me: the domain is currently hosted on another reseller, specifically resource1demo.com. You will need to remove the domain from your account there in order to host it here.
If you hosted with Byethost before, you could also ask them to remove your domain.