Hägersten-Liljeholmen has been merged with Alvsjö into the new city district Hägersten-Älvsjö on 2020-07-01 (source: https://start.stockholm/aktuellt/nyheter/2020/07/hagersten-alvsjo-ny-stadsdelsforvaltning/ and https://edokmeetings.stockholm.se/committees/kommunfullmaktige/mote-2020-04-20/protocol/kommunfullmaktiges-protokoll-2020-04-20-med-debattpdf)

Should the two areas with admin_level 9 be merged to reflect this?
https://www.openstreetmap.org/relation/5691404
https://www.openstreetmap.org/relation/5691543 