Defined Table field rows that you no longer want to track data for can be set to hidden from your users so that they no longer see the row on form start and edit. This can be used to retain existing data that has been entered before the row was hidden. Forms that contain existing data in the table row will have a "hidden" badge next to the row name to identify that this row is no longer in use while still retaining any existing data. Clearing the existing data will hide the hidden row on your form.
In the example table below, we will hide Row 3.
Top Menu >> Setup >> Select your Process >> Select the Fields tab
Click on the Fields button to edit the table rows.
Hover over the field you want to hide, then uncheck the Shown option. Hidden rows will have a "hidden" badge next to the row name. Click the Up arrow in the top left to navigate back to the field setup page.
When you Start a new form, the row will now be hidden on the table and users will not be able to enter in a table row value.
Existing forms will still retain the data in the hidden row and will display on your form.
On form edit, there will be a "hidden" badge next to the row to let users know that this row is not shown on newer forms. Hovering over the badge will also let users know that clearing the value in this row will hide the row going forward.