If I have 2 custom drop downs, 1 for "category" and the other for "sub-category". Can I have the selection options of "sub-category" be based upon what was the selected option within "category". So if for example my category is "Project ABC" the valid selection options for sub-category should not be "ModuleGGG", "Module "JJJ" and "Module SSS". But if my cateogry is "Project DEF", the valid selection options would be "Module TTT", "Module "VVV.
Note using JIRA Server version v7.13.
And is there a way to do this without purchasing a plug-in?