How to locked page saying this request already submitted

Question

Hi,

 

i have implemented Infopath Query String parameter URL refering https://blogs.msdn.microsoft.com/infopath/2010/06/03/how-to-pass-querystring-data-into-an-infopath-form/

 

now its working fine for me.

 

while doing testing got to know if i pass same parameter in URL and hit the enter buttion it would be lock and saying this request is already exist?