diff --git a/Update/UpdateVersion.js b/Update/UpdateVersion.js
index 1b5ff2e3..c44748eb 100644
--- a/Update/UpdateVersion.js
+++ b/Update/UpdateVersion.js
@@ -79,6 +79,18 @@ function extractReleaseNotes(body) {
     return match ? match[1].trim() : "";
 }
 var CurrentNotes = extractReleaseNotes(String(process.argv[5] || ""));
+// Editing a PR (including AI reviewers adding summaries on the author's behalf) must never bump the version;
+// it may only refresh this PR's own entry. Versions are bumped on opened/synchronize runs.
+if (eventAction === "edited") {
+    if (LastPR != CurrentPR) {
+        console.log("PR edited, but the latest version entry is not this PR's. Not bumping the version.");
+        process.exit(0);
+    }
+    if (NpmVersion != LastJSVersion) {
+        console.warn("PR edited and owns the latest entry, but package.json and XMOJ.user.js are out of sync; skipping the metadata refresh.");
+        process.exit(0);
+    }
+}
 if (LastJSVersion != NpmVersion) {
     console.warn("Assuming you manually ran npm version.");
 } else if (!(LastPR == CurrentPR && NpmVersion == LastJSVersion)) {