diff --git a/app/api/canvas/local-edit/route.ts b/app/api/canvas/local-edit/route.ts
index 9db793cde..6aeb5aba3 100644
--- a/app/api/canvas/local-edit/route.ts
+++ b/app/api/canvas/local-edit/route.ts
@@ -1442,6 +1442,10 @@ export async function POST(request: NextRequest) {
             ? true
             : undefined,
           protectedRegions: scaleAdjustCompositeRegions,
+          rejectFailedCandidates:
+            useScaleAdjustCoordinateGuide && Boolean(scaleAdjustModelFamily)
+              ? true
+              : undefined,
           sourceImageUrl,
           regions: regions.map((region) => region.rect),
           ...(typeof scalePercent === "number"
diff --git a/lib/canvas/generate-image.ts b/lib/canvas/generate-image.ts
index 7dfbe27f7..03541d2dd 100644
--- a/lib/canvas/generate-image.ts
+++ b/lib/canvas/generate-image.ts
@@ -126,11 +126,13 @@ export interface CanvasGenerateImageResult {
 class ScaleAdjustOutputRejectedError extends Error {
   reason: string;
   diffScores?: number[];
+  images?: ParsedImage[];
   outsideDiffScores?: number[];
 
   constructor(params: {
     reason: string;
     diffScores?: number[];
+    images?: ParsedImage[];
     outsideDiffScores?: number[];
   }) {
     const message =
@@ -141,6 +143,7 @@ class ScaleAdjustOutputRejectedError extends Error {
     this.name = "ScaleAdjustOutputRejectedError";
     this.reason = params.reason;
     this.diffScores = params.diffScores;
+    this.images = params.images;
     this.outsideDiffScores = params.outsideDiffScores;
   }
 }
@@ -1241,6 +1244,7 @@ async function applyScaleAdjustVerificationToImages(params: {
         ? "outside-frame-changed"
         : "no-effective-scale-change",
       diffScores: selected.changeDiffScores,
+      images: [selected.cleanedImage || selected.image],
       outsideDiffScores: selected.outsideDiffScores,
     });
   }
@@ -2513,8 +2517,9 @@ export async function generateCanvasImage(
     });
   }
 
-  const scaleAdjustRejected =
-    caughtError instanceof ScaleAdjustOutputRejectedError;
+  const scaleAdjustRejection =
+    caughtError instanceof ScaleAdjustOutputRejectedError ? caughtError : null;
+  const scaleAdjustRejected = Boolean(scaleAdjustRejection);
 
   if (scaleAdjustRejected) {
     console.info("[Canvas Generate Image] Skip model health failure for scale adjust rejection:", {
@@ -2523,7 +2528,6 @@ export async function generateCanvasImage(
       selectedModelId: selectedModel.model.modelId,
       error: caughtError instanceof Error ? caughtError.message : String(caughtError),
     });
-    throw caughtError;
   } else {
     await recordAiModelHealthFailure({
       model: selectedModel.model,
@@ -2562,6 +2566,8 @@ export async function generateCanvasImage(
   const allowFailover = request.allowFailover !== false;
   const shouldFailover =
     shouldFailoverAiModelError(caughtError) ||
+    (scaleAdjustRejected &&
+      Boolean(debugMeta?.scaleAdjustPreferSameNameProviderFailover)) ||
     (Boolean(debugMeta?.detailFixedModelApplied) && Boolean(caughtError));
   const fallbackModel = allowFailover && shouldFailover
     ? findCanvasFailoverModel({
@@ -2599,5 +2605,22 @@ export async function generateCanvasImage(
     });
   }
 
+  if (scaleAdjustRejection?.images?.length) {
+    console.warn("[Canvas Generate Image] Returning rejected scale adjust candidate because no fallback remains:", {
+      debugLabel,
+      imageCount: scaleAdjustRejection.images.length,
+      reason: scaleAdjustRejection.reason,
+      selectedModelRef: selectedModel.model.id,
+      selectedModelId: selectedModel.model.modelId,
+      ...debugMeta,
+    });
+    return {
+      images: scaleAdjustRejection.images,
+      model: selectedModel.model.displayName,
+      modelRef: selectedModel.model.id,
+      prompt: resultPrompt,
+    };
+  }
+
   throw caughtError;
 }