Version 0+git2018.12.08-3 of casacore-data-observatories is marked for autoremoval from testing on Sat 21 Nov 2026. It is affected by #1150385. The removal of casacore-data-observatories will also cause the removal of (transitive) reverse dependency: casacore-data. It depends (transitively) on python-casacore, affected by #1150354. You should try to prevent the removal by fixing these RC bugs.