Version Any lower to newer version
If you have custom report styles that use system RDDs and you build a solution you can add the system RDDs to the solution and when you install on the latest version it will overwrite the newer system RDDs. In my case MtlTags, PartTranRpt and MtlQueue had additional tables or fields added.
Here is the fix provided by support that reruns part of the conversion.
https://epiccare.epicor.com/epiccare?id=epiccare_kb_article&sys_id=KB0043739