How to add an existing web to a customer

Hey,

I would like to add an existing web to a customer. But it's not possible to do that because you just can chose an customer by creating a new web.

So I had a look into the database but I can't find the assignments of webs and customers. Where can I find them?

Thanks!

 

Thanks, that works fine.

 

I tried this but it doesn't do anything.

I get a message that the website is moved to a new customer. But nothing has changed.

How can I find what is going on and solve this problem?