diff --git a/src/KoalaWiki/Services/StatisticsService.cs b/src/KoalaWiki/Services/StatisticsService.cs
index 770a99d4..0d1fc0da 100644
--- a/src/KoalaWiki/Services/StatisticsService.cs
+++ b/src/KoalaWiki/Services/StatisticsService.cs
@@ -1135,6 +1135,7 @@ public async Task<bool> GenerateDailyStatisticsAsync(DateTime? date = null)
                 // 创建新的统计数据
                 var dailyStats = new DailyStatistics
                 {
+                    Id = Guid.NewGuid().ToString(),
                     Date = targetDate,
                     NewUsersCount = newUsersCount,
                     NewRepositoriesCount = newRepositoriesCount,