Webflow form error, if the e-mail address already exists in Mailchimp

Dear community,

I have connected a Webflow Forumlar with Mailchimp.
This requires different inputs. Several radio buttons, name, email, free text field, etc.
I use this to allow users to register for a beta test.

The first time you use this form, everything works without problems.

But now I have found out that if an email or the user is already listed at Mailchimp, the form doesn’t work anymore. Is there a possibility that the form is still sent and the previous entries in Mailchimp are updated / overwritten?

I would be very happy about feedback and hopefully a solution.

Best regards