Upgrading to DD5.6 from 5.5.2

System

Currently, I'm running DD 5.5.2 with DAS and doing research into an upgrade to DD5.6 - however, looking at the DataDeploy Release Notes (pg12) it says to drop the following tables IWTRACKER, IWOV_IDMAPS and IWDELTRACKER. This leads to the question - what does one do with the existing metadata in those tables? In looking at the documentation if one is running DAS since the table convention has changed (I'd be curious how it changed)
the old data it appears is useless.

Has anyone had any issues with the 5.6 versions of DD and OD

Thanks