Use GPP to create a reg key and a value.

Hello, 

I need to deploy the below reg file to a group of computers:

Windows Registry Editor Version 5.00[HKEY_CLASSES_ROOT\JNLPFile\DefaultIcon]@="C:\\Program Files\\Java\\jre1.8.0_211\\bin\\javaws.exe,0"

I am trying a GPP>reg page, but it does not seem to work.  Would someone please check and advice?

My ultimate goal is to have the result in the second screenshot.