As per https://github.com/tomboy-notes/tomboy/blob/master/README.md: Please note that this repo is for the previous generation of Tomboy, which is no longer actively developed. See Tomboy-NG for current activities. Additionally, per https://wiki.gnome.org/Apps/Tomboy: tomboy-ng - The currently active manifestation of Tomboy, Linux, Windows and Mac OSX, download install kits from Github. Tomboy's last commit was https://github.com/tomboy-notes/tomboy/commit/e7a27fbe4589b7190f95bacb3b073ac2e17ff455 back in January 2018 and efforts have instead switched to tomboy-ng located at https://github.com/tomboy-notes/tomboy-ng (homepage https://wiki.gnome.org/Apps/Tomboy/tomboy-ng). It would be nice if tomboy were deprecated/removed/retired and work instead done to maintain a fedora port of tomboy-ng.
This bug appears to have been reported against 'rawhide' during the Fedora Linux 39 development cycle. Changing version to 39.