Replacing a source should say which claim changed

A correction-trail note about naming the exact claim changed when replacing an older source.

A source replacement note is much more useful when it names the claim that changed. “Updated source” gives future readers almost nothing. “Replaced 2024 pricing blog with 2026 official pricing page for current plan limits” tells them scope, reason, and reuse boundary. Newer links are not automatically better; the new source still needs to answer the same question.