Refreshing a custom table in Power Apps to its data source

Hi,

I have a custom table in Dataverse for Power Apps. This table was managed by someone else whose account no longer exists, and all their connections were removed. Now, the table needs to be refreshed. It seems there's a broken connection between the table and the source file located on Sharedrive. 

Any ideas on how to relink/update a table in Power Apps to its source file to get the current data? Is it best to re-import a brand new data table? 

To note, a Dataflow connection has been recreated to the table, but the table still isn't updating.