How to close session in pega Web Mash up

Two URLs(Mentioned below) are exposed to end customers and they can initiate any case type as they would like to. Here problem comes in, if one Url hit for first time and enters application data then again change the Type in url to other caseType then it's taking to previous session view and same data instead of new page .

Just guessing ,Is it possible to close the existing session whenever CaseType querystring gets changed.

***Edited by Moderator Marissa to update platform capability tags****


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