The absolute minimum, and this isn't really difficult, is to release notification of the change of wording etc. in WD including copy'n'paste ready sections like they used to do. Then release a new codex, content in the knowledge that everyone has an up to date codex, even if some of it has a sheet of clarifications stuck to it.
Or let people swap their old incorrect one for a new one without having to pay. Its their screw up, sofware companies release patches etc. for free. Its poor customer service when people don't even know that a new version has been released. See the Witchhunters rhinos now getting repair rolls in later prints. No-one even knew about it.
Or let people swap their old incorrect one for a new one without having to pay. Its their screw up, sofware companies release patches etc. for free. Its poor customer service when people don't even know that a new version has been released. See the Witchhunters rhinos now getting repair rolls in later prints. No-one even knew about it.