I was having single property and report suite for my website. Now for a sub domain i have created another property and also report suite to capture data from this property. Now i want this data in old report suite too without changing current scenario.
How can i create duplicate property with same rule set and different report suite.
If at all possible, I'd recommend correcting that variable mappings ASAP. We really encourage having a variable schema across properties for this reason as well as a few others. It sounds like you are looking for a way to either deploy two different DTM instances on the same site (not supported) or a way to export data from one Analytics report suite to another. I'd suggest posting a question in the Adobe Analytics community to see if they have a solution. I'm not familiar with everything that is possible within that solution.
You can also have more than one report suite in each property. So if you'd just like to have the data from the subdomain in the parent domain's report suite, you could use multi suite tagging. I've pasted a few links below for your review: