@33,
In that case it is relatively simple. first add the SharePoint list you want to use as your new data source via the data window on the left side of the screen in the tree view. see screenshot below.

You can remove your previous data source by clicking the 3 dots on the right side of the data window, and clicking Remove, see screenshot below.

Then you will get a bunch of errors where your previous SharePoint List was being referenced. you will just update those controls with the name of your new SharePoint List and you should be good.
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