diff --git a/backend/services/contribution-service/src/pre-planting/application/handlers/pre-planting-merge-synced.handler.ts b/backend/services/contribution-service/src/pre-planting/application/handlers/pre-planting-merge-synced.handler.ts
index b328e608..fdf47300 100644
--- a/backend/services/contribution-service/src/pre-planting/application/handlers/pre-planting-merge-synced.handler.ts
+++ b/backend/services/contribution-service/src/pre-planting/application/handlers/pre-planting-merge-synced.handler.ts
@@ -98,10 +98,8 @@ export class PrePlantingMergeSyncedHandler {
       return null;
     }
 
-    // 解析 mining_enabled_at（可能是 ISO 字符串或 epoch ms 整数）
-    const miningEnabledAt = new Date(
-      typeof miningEnabledAtRaw === 'number' ? miningEnabledAtRaw : miningEnabledAtRaw,
-    );
+    // 解析 mining_enabled_at（可能是 ISO 字符串或 epoch ms 整数，new Date() 均可处理）
+    const miningEnabledAt = new Date(miningEnabledAtRaw);
 
     this.logger.log(
       `[PRE-PLANTING-MERGE] Detected contract signed: mergeNo=${mergeNo}, ` +
diff --git a/backend/services/contribution-service/src/pre-planting/application/services/pre-planting-contribution.service.ts b/backend/services/contribution-service/src/pre-planting/application/services/pre-planting-contribution.service.ts
index ed9b5daa..ddc4933a 100644
--- a/backend/services/contribution-service/src/pre-planting/application/services/pre-planting-contribution.service.ts
+++ b/backend/services/contribution-service/src/pre-planting/application/services/pre-planting-contribution.service.ts
@@ -587,6 +587,15 @@ export class PrePlantingContributionService {
       return;
     }
 
+    if (sourceOrders.length < sourceOrderNos.length) {
+      // 理论上不应发生（时序保证 order CDC 先于 merge CDC 到达），
+      // 若发生则记录 warn，以已同步的订单为准继续执行（不阻断）
+      this.logger.warn(
+        `[PRE-PLANTING-MERGE] Partial orders in tracking table for merge ${mergeNo}: ` +
+        `found ${sourceOrders.length}/${sourceOrderNos.length}. Proceeding with available records.`,
+      );
+    }
+
     // Step 2: 计算份额 sourceAdoptionId 列表（10B 偏移，与 calculateForPrePlantingOrder 一致）
     const portionSourceAdoptionIds = sourceOrders.map(
       (o) => PRE_PLANTING_SOURCE_ID_OFFSET + o.originalOrderId,