diff --git a/M02_MasterTemplete/M02_MasterTemplete_Library_Same.css b/M02_MasterTemplete/M02_MasterTemplete_Library_Same.css
index 1250994b8..fe7414dbf 100644
--- a/M02_MasterTemplete/M02_MasterTemplete_Library_Same.css
+++ b/M02_MasterTemplete/M02_MasterTemplete_Library_Same.css
@@ -17,7 +17,7 @@
   align-items: center;
   gap: 8px;
 }
-.m02-same__head > span {
+.m02-same__name {
   flex: 1;
   min-width: 0;
   overflow: hidden;
diff --git a/M02_MasterTemplete/M02_MasterTemplete_Library_Same.ts b/M02_MasterTemplete/M02_MasterTemplete_Library_Same.ts
index 29e286a67..ca6551690 100644
--- a/M02_MasterTemplete/M02_MasterTemplete_Library_Same.ts
+++ b/M02_MasterTemplete/M02_MasterTemplete_Library_Same.ts
@@ -154,11 +154,11 @@ export function openLibrarySame(opt: SameOptions): void {
       opt.changed();
       draw();
     } catch (error) {
-      showToast(
-        error instanceof StaleError ? `${tx("Stale")} — ${why(error)}` : why(error),
-        "error",
-      );
-      if (error instanceof StaleError) void load();
+      // 판 다름(409 · 서버 몸 = {stale, 판}) = 까닭 글 없음 → 「그새 바뀜」만
+      const text = why(error);
+      const stale = error instanceof StaleError;
+      showToast(stale && text.startsWith("HTTP") ? tx("Stale") : text, "error");
+      if (stale) void load();
     }
   };
 
@@ -240,7 +240,6 @@ export function openLibrarySame(opt: SameOptions): void {
     };
     const mergeButton = createButton({
       label: tx("Merge"),
-      size: "sm",
       onClick: () => void merge(group, keep),
     });
     const tag = group.꼬리표 === "수량만 다름" ? tx("QtyOnly") : tx("Same");
@@ -248,7 +247,10 @@ export function openLibrarySame(opt: SameOptions): void {
       className: "m02-same__head",
       children: [
         createBadge(tag, group.꼬리표 === "수량만 다름" ? "warning" : "info"),
-        el("span", { text: `${group.문서[0].이름} · ${group.문서.length}` }),
+        el("span", {
+          className: "m02-same__name",
+          text: `${group.문서[0].이름} · ${group.문서.length}`,
+        }),
         mergeButton,
       ],
     });