Does an updated link disable an old link?

Hey there! I create a form for my business where people can sign up and pay for a class. So far i've done classes one at a time and send anyone registering the link. Well, now I'm getting more requests to put on these classes. My question is...if I have a link i've given someone and then a new person wants to add a class so i have to re publish that updated date for the new party and get a new link to send, does that disable the old link i've sent to the previous person? I will potentially be adding a lot of dates so that would be terrible if my old links expire because I added information : ( 

any help or advice on this? 

Thank you!

The default form URL will not expire. It would stay the same even when you made changes to your form.

However, this case is different if you are using custom form URL. If you changed the custom form URL into a new one, the old one will be invalidated. If you're not using custom form URL, then you're all good.

Regards

Great news! Thank you so much!
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My pricing isnt populating on my form and Ive had several people try and pay through there. Can you help me get it back up and running please?
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May we know how you are populating the form, is it through URL parameters explained on this guide? http://www.jotform.com/help/71-Prepopulating-the-fields-to-your-JotForm-via-URL-parameters

Can you please provide the full URL of the form with the URL parameters that populates the fields so we can inspect it here? If it's not populating the fields then the field name used in the URL parameter might be incorrect.