Validation errors Description="Attribute 'http://schemas.openxmlformats.org/wordprocessingml/2006/main:styleId' should have unique value. Its current value 'ListTable6Colorful-Accent5' duplicates with others."

[PrzemyslawKlys]

Basically all tables styles are reporting this error. This seems standard even for documents generated by Office 365. When you create a word document and add 1-3-50 tables to it, and add multiple styles validation errors will occur. It doesn't seem to affect anything and doesn't show up for FileFormat 2007. Only for newer formats.