This looks like its not how things should be to me .... have the same icon on every (4) new databases I have done now over time ... is it normal ?
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The little red stop sign indicates that there is an error in the category.
This is usually a formula referring to a no longer existing category. Go down the hierarchy until you find the category in error.
See the help topic on the Category View. There is a section named Category Icons which explains every icon.
Use the TOC at the top of each help topic to quickly locate sections.