Version 0.25.0-2 of prometheus-blackbox-exporter is marked for autoremoval from testing on Wed 02 Apr 2025. It depends (transitively) on golang-golang-x-exp, affected by #1096213. You should try to prevent the removal by fixing these RC bugs.
Migration status for prometheus-blackbox-exporter (0.25.0-2 to 0.26.0-1): BLOCKED: Maybe temporary, maybe blocked but Britney is missing information (check below)