Happened to me too, I just resubmitted my EE and waited for another invitation. I got another one in 2 weeks. They send them out periodically.
Assuming the change you want to make doesn't put you outside the group of people they want to nominate you should be alright.
verma91 said:
I made some changed and my profile is ineligible . Is it possible to create a new one and still use the old invitation letter ?