https://musicbrainz.org/cdtoc/8F2SoQV55oOUiUQ2O2i6F46JQqA- was used to set the track lengths of the only associated release and still shows the “Set track durations” link afterwards, this seems to be the case for all cdtoc pages I have checked. The release/discids page of the above example correctly hides the link.

Other release/discids pages of pre-NGS releases with lots of likely wrong disc IDs seem to be displayed correctly too, while the page of the currently used TOC also shows the “Set track durations” link for every listed release.