[xml2rfc] <rfc> attribute category deprecated, but required ?

Roger Price <roger@rogerprice.org> Sat, 30 January 2021 15:30 UTC

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From: Roger Price <roger@rogerprice.org>
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Subject: [xml2rfc] <rfc> attribute category deprecated, but required ?
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RFC7991 tells us

    2.45.1.  "category" Attribute
    Deprecated; instead, use the "name" attribute in <seriesInfo>.

So I wrote

    <seriesInfo name="Internet-Draft" value="&docName;">

and I omitted the category="info" attribute from element <rfc>.  I got the 
error message:

Note: Calling rfc_check_attribute_values()
Note: Calling check_attribute_values()
/mnt/home/rprice/IETF/nut/draft-rprice-ups-management-protocol-00.xml(6): Error: 
Expected a valid category for submissionType='IETF', one of 
info,bcp,historic,std,exp, but found 'None'

If I include category="info", xml2rfc accepts my markup.
Does this mean that although deprecated, attribute category is required?