Different fields from Jira Plugin for Excel for new report

[Andy Christley]

I have a report that is successfully importing data into Excel from a Jira Filter. I want to create a new version of this report so i have created a copy of the excel file, created an new filter and connected to that filter via the plugin in the new report. However when i go to add some new fields from my new filter the fields from the previous filter exist and if i add the new ones then it changes what appears on both the new (as i want) and the old version (which i don't want to change)? Can i only run one set of fields in the plugin for whatever report i am using? Does the plugin not change them even if a new filter is used?