[ubuntu-studio-users] Two Broken Packages Prevent Updates After Upgrade

[wmichaelb at fuse.net]

I just used the upgrade tool to upgrade Ubuntu Studio 22.04 to 24.04, standard KDE desktop. The system boots and runs, but is blocking hundreds of updates because two packages are labeled as having unmet dependencies. Unfortunately, the package versions that are installed are the only ones available: 
  
 The following packages have unmet dependencies:  libfontconfig1 : Depends: fontconfig-config (>= 2.15.0-1.1ubuntu2) libfontconfig1:i386 : Depends: fontconfig-config:i386 (>= 2.15.0-1.1ubuntu2) E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution). 
Running apt --fix-broken install with no packages does nothing. Synaptic shows fontconfig-config 2.15.0-1.1ubuntu2 
and fontconfig-config:i386 2.15.0-1.1ubuntu2 as both the installed and latest versions. Can someone suggest where 
I can go from here? Thanks in advance.   
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