Individual link that doesn't close out upon submission (until a specific time/expiration)

Hi All,
We have a client that wants to distribute a survey using unique links/email addresses --- but they want the individual to be able to take that survey/change their responses repeatedly up until a specific point.
We've set up the link in the email as 'multiple response' - but the client doesn't like that the tool adds each new response from the same person. They want the tool to overwrite any prior responses; so one row per respondent.
Is this possible with an Individual Link? To allow the person to use the same line and overwrite any prior responses?
Thanks for any guidance!