How to connect/replace new connection with existing one on BI service?

[qwerty123]

Hello, 

I have an offline excel dataset that I have used to create a report on BI desktop.

Now, that same dataset is availableto be online via the power BI dataset.

How can I leverage the BI dataset and replace that with my offline file without manually creating the report from scratch again?

Like is there a replace data source functionality that I can use?

Thanks!