Template talk:Stamps of country by year

The template is causing the categories it's added to be in both a parent and child category. For instance with Category:1895 stamps of Uganda template added both Category:1895 stamps and Category:1895 stamps of the British Empire when the later is already in the former, which it clearly shouldn't be doing. The creator of the template seems to have retired or I'd ask them and I can't do it myself. So can someone else please fix the problem? Thanks. Adamant1 (talk) 09:01, 28 May 2023 (UTC)[reply]