That's odd as you should be able to create that relationship as many times as you need, giving each one a different name,
Alterntaively you might wnt to look at using a page control. That allows you to use a query to generate the list of consultants and you can then select several entries, click copy and it puts all the consutlants into a text attribute. You can also remove people from the text list too.
Can you give us some more detail behind the requirement that you're trying to address please? There may well be better ways of doing this.
Andy, Thanks for your interest , Dave has responded with some helpful tips on how to do this.