diff --git a/app/common/service/GameBetSettleService.php b/app/common/service/GameBetSettleService.php
index abf28f1..79fdc0d 100644
--- a/app/common/service/GameBetSettleService.php
+++ b/app/common/service/GameBetSettleService.php
@@ -447,6 +447,12 @@ final class GameBetSettleService
         try {
             $already = Redis::get($dedupKey);
             if ($already !== false && $already !== null && $already !== '') {
+                Log::channel('ws')->info('jackpot.hit skipped (dedup exists)', [
+                    'period_id' => $periodId,
+                    'period_no' => $periodNo,
+                    'result_number' => $resultNumber,
+                    'hit_count' => count($jackpotHits),
+                ]);
                 return;
             }
         } catch (Throwable) {