Use Get Previous Revision to collect the data from the Podio Field before it is updated. This function is extremely helpful in archival apps and/or apps where you do not want users to be able to make changes.
Select the Flow Trigger and add any required Filters
Add the Get Previous Revision action.
Add an Action to your Flow. For example the Update Item action and select the fields you wish to have updated to the previous revision. Using the Calc or Value field, drop in the associated field tokens.