Board Thread:Support Requests - Getting Technical/@comment-37730351-20190806233110/@comment-27958705-20190807013031

to copy template, you have to use Source edit mode. also, you will have to copy all sub-templates. in general case, it is a very bad idea to copy templates from large wikis: they might (and will) be overcomplicated and probably unmaintainable.

i'd suggest to build your own template, or to find something simpler, that you will be able to maintain. or to copy, at least :)