220: Tag combination already used to tag an item
While you can use the same tag as often as you want in a single-tagged list, multiple-tagged lists require that the combination of tags is only used once. In your case a tag combination is used twice though.
Details for lists of items with a varying number of tags
In tagged lists which contain items with a varying numbers of tags, an item’s full tag combination may not occur again as the initial part of a longer tag combination either. For example, the following list is invalid, because the full tag combination
<A><B> from the first line reappears as initial part of the tag combination
<A><B><C> in the second line.
<A><B> X <A><B><C> Y
In contrast, the next list is valid. The full tag combination
<E><F> does not reappear later.
<E><G> occurs twice as initial part of different tag combinations in the second and third line, but
<E><G> is not a full tag combination of any item, so this is okay.
<E><F> X <E><G><H> Y <E><G><I> Z
Make sure that every item in a tagged list has a unique tag combination. Order does matter, so
<France><Belgium> is different from
<Belgium><France> and both can be used in the same list. This could be a list of results from football matches where the home team is named first for example. So
<Belgium><France> refer to different matches, one in France and the other one in Belgium.