diff --git a/src/features/production/components/ShotProductionAssets.vue b/src/features/production/components/ShotProductionAssets.vue
index 9a01568..c063f22 100644
--- a/src/features/production/components/ShotProductionAssets.vue
+++ b/src/features/production/components/ShotProductionAssets.vue
@@ -66,6 +66,7 @@ const canGenerateVideo = computed(
     () =>
         !assetBlocked.value && !activeVideo.value && !!props.videoReadiness && props.videoReadiness.issues.length === 0
 )
+const keyframeStale = computed(() => !!props.keyframeReadiness?.primaryKeyframeStale)
 
 watch(key, () => {
     confirmingKeyframe.value = ''
@@ -241,9 +242,12 @@ async function inspectSpecs() {
                 <StatusBadge
                     v-if="keyframeReadiness"
                     :status="keyframeReadiness.status"
-                    :label="productionStatusLabel(keyframeReadiness.status)"
+                    :label="keyframeStale ? '主首帧已过期' : productionStatusLabel(keyframeReadiness.status)"
                 />
             </div>
+            <p v-if="keyframeStale" class="alert mt-3 text-xs" role="status">
+                当前主首帧使用的主体参考资产已经变化，旧图仍保留但不会继续进入视频生成。请重新生成主首帧。
+            </p>
             <ul v-if="keyframeReadiness?.issues.length" class="mt-3 space-y-2 text-xs text-danger">
                 <li v-for="issue in keyframeReadiness.issues" :key="issue.code">
                     {{ issueLabel(issue.code) }}：{{ issue.reason }}
@@ -260,6 +264,7 @@ async function inspectSpecs() {
                         <div class="flex flex-wrap items-center gap-2">
                             <StatusBadge :status="item.status" :label="productionStatusLabel(item.status)" />
                             <span v-if="item.isPrimary" class="tag">主首帧</span>
+                            <span v-if="item.isPrimary && keyframeStale" class="tag">已过期</span>
                             <span class="text-[10px] text-muted"
                                 >{{ item.width || '—' }} × {{ item.height || '—' }}</span
                             >
@@ -286,7 +291,7 @@ async function inspectSpecs() {
             </div>
             <p v-else class="mt-4 text-xs text-muted">尚无首帧记录。</p>
             <button class="button button-secondary mt-4" :disabled="!canGenerateKeyframe" @click="keyframeOpen = true">
-                <ImagePlus :size="14" />{{ currentKeyframe ? '再生成一张候选' : '生成首帧' }}
+                <ImagePlus :size="14" />{{ keyframeStale ? '重新生成主首帧' : currentKeyframe ? '再生成一张候选' : '生成首帧' }}
             </button>
         </div>
 
@@ -415,6 +420,7 @@ async function inspectSpecs() {
             :shot-id="shot.shotId"
             :shot-title="shot.title"
             :keyframes="keyframes"
+            :replace-primary="keyframeStale"
             :disabled="!canGenerateKeyframe"
             @generate="generateKeyframe"
         />