Cannot get exist value when using Hidden parameter of Macro

[Michael]

Hi, Guys

When I use Hidden parameter to accomplish my targets:

• When create macro, this hidden parameter is empty, so I generate one with UUID and set it to the parameter;
• When edit macro, as this parameter already has value, just use the exist one.

The first target is realized. But the second one has some problems: 1. when edit macro, I cannot get the exist value through method parameterField.getValue(). So a new UUID is set to this parameter; 2. Something went worth is that, a new UUID is set failed actually but the older one remains (Something went wrong but my target is realized.)

Bellow is the guide that I'm following to:

Including Information in your Macro for the Macro Browser (atlassian.com)

Thanks

Michael