Must I archive my journal paper again in my thesis?

I archieved a previously published chapter of my thesis as a journal paper already. Do I need to include it in the archive of my PhD thesis?

Yes

Published papers and thesis chapters are considered separate items, since the publication date, and thus, the deadline for archiving, of such papers is commonly much earlier than the publication date of the complete thesis. However, in most cases the same datafile can be reused for the thesis archive.