Using flow variables in updated 'Joiner' node

I have been successfully using a flow variable to select the included column from the ‘right’ table in a Joiner node.

I have updated KNIME to version 5.5.1. The Joiner node has been updated and when I click the flow variables button for the Bottom input (‘right’ table) section I get a message saying ‘The following set flow variables are deprecated: “model.rightColumnSelectionConfig.included_names”…’

It’s pretty annoying for an update to change nodes in a way that breaks workflows, but what’s even more annoying is that I don’t seem to be able to fix it!

I’ve created a flow variable containing the name of the column I want to select and applied it to rightColumnSelectionConfigV2.manualFilter.manuallySelected but the named column is not being joined. I’ve tried adding a flow variable containing the string ‘MANUAL’ and applied it to rightColumnSelectionConfigV2.mode but this hasn’t helped.

Can anyone tell me what I’m doing wrong? Or is there a bug in the new node?