This has persisted for about a week, through two or three major updates via apper.
If I don’t deselect it from install, the update fails.
I thought I might be able to resolve it via Yast online updates, as that might offer me a technical resolution of:
ignore
downgrade
uninstall
… but unlike the distant past I can’t seem to get any updates to show in yast, to select them for install, to generate an error, for which yast would offer a solution.