Duplicating Dashboard with New Data Set

Hello! I am trying to duplicate an existing Analysis/Dashboard, but with a new data source. The new data source entails different accounts than the original, it is structured the same way, but has three less fields.
I have duplicated my dashboard and changed the data source, but it changed the data source for the original dashboard too. Is it possible to attach a new data source to the duplicated dash without affecting the original?

Hi Sam,
When you update the data source, it will update all the dataset, Analysis and dashboard connected with that.
Create new data source, Data set and replace the old data set with new one on duplicated Analysis and publish a new dashboard from that Analysis. This way original dashboard will not be affected.