diff --git a/src/LinkDotNet.Blog.Web/Features/Admin/Settings/SettingsPage.razor b/src/LinkDotNet.Blog.Web/Features/Admin/Settings/SettingsPage.razor
index 3d511107..ff5cb02c 100644
--- a/src/LinkDotNet.Blog.Web/Features/Admin/Settings/SettingsPage.razor
+++ b/src/LinkDotNet.Blog.Web/Features/Admin/Settings/SettingsPage.razor
@@ -47,7 +47,7 @@
 
 	private void RunVisitTransformer()
 	{
-		InstantJobRegistry.AddInstantJob<TransformBlogPostRecordsService>();
+		InstantJobRegistry.AddInstantJob<TransformBlogPostRecordsJob>();
 		ToastService.ShowInfo("Transformer was started.");
 	}
 }
diff --git a/src/LinkDotNet.Blog.Web/Features/TransformBlogPostRecordsService.cs b/src/LinkDotNet.Blog.Web/Features/TransformBlogPostRecordsJob.cs
similarity index 89%
rename from src/LinkDotNet.Blog.Web/Features/TransformBlogPostRecordsService.cs
rename to src/LinkDotNet.Blog.Web/Features/TransformBlogPostRecordsJob.cs
index 4ea62d96..208f4cb8 100644
--- a/src/LinkDotNet.Blog.Web/Features/TransformBlogPostRecordsService.cs
+++ b/src/LinkDotNet.Blog.Web/Features/TransformBlogPostRecordsJob.cs
@@ -10,19 +10,19 @@
 
 namespace LinkDotNet.Blog.Web.Features;
 
-public sealed partial class TransformBlogPostRecordsService : IJob
+public sealed partial class TransformBlogPostRecordsJob : IJob
 {
     private static readonly SemaphoreSlim Semaphore = new(1, 1);
     private readonly IRepository<BlogPost> blogPostRepository;
     private readonly IRepository<UserRecord> userRecordRepository;
     private readonly IRepository<BlogPostRecord> blogPostRecordRepository;
-    private readonly ILogger<TransformBlogPostRecordsService> logger;
+    private readonly ILogger<TransformBlogPostRecordsJob> logger;
 
-    public TransformBlogPostRecordsService(
+    public TransformBlogPostRecordsJob(
         IRepository<BlogPost> blogPostRepository,
         IRepository<UserRecord> userRecordRepository,
         IRepository<BlogPostRecord> blogPostRecordRepository,
-        ILogger<TransformBlogPostRecordsService> logger)
+        ILogger<TransformBlogPostRecordsJob> logger)
     {
         this.blogPostRepository = blogPostRepository;
         this.userRecordRepository = userRecordRepository;
@@ -110,8 +110,14 @@ private async Task TransformRecordsAsync()
         var userRecords = await userRecordRepository.GetAllAsync(
             filter: r => r.UrlClicked.StartsWith("blogPost/"));
 
-        var newBlogPostRecords = GetBlogPostRecords(blogPosts, userRecords);
-        var oldBlogPostRecords = await blogPostRecordRepository.GetAllAsync();
+        var newBlogPostRecords = GetBlogPostRecords(blogPosts, userRecords).ToArray();
+        if (newBlogPostRecords.Length == 0)
+        {
+            return;
+        }
+
+        var earliestDate = newBlogPostRecords.MinBy(r => r.DateClicked).DateClicked;
+        var oldBlogPostRecords = await blogPostRecordRepository.GetAllAsync(f => f.DateClicked >= earliestDate);
 
         var mergedRecords = MergeRecords(newBlogPostRecords, oldBlogPostRecords);
 
@@ -123,10 +129,10 @@ private async Task TransformRecordsAsync()
         LogDeletedUserRecords();
     }
 
-    [LoggerMessage(Level = LogLevel.Information, Message = $"{nameof(TransformBlogPostRecordsService)} is starting")]
+    [LoggerMessage(Level = LogLevel.Information, Message = $"{nameof(TransformBlogPostRecordsJob)} is starting")]
     private partial void LogTransformStarted();
 
-    [LoggerMessage(Level = LogLevel.Information, Message = $"{nameof(TransformBlogPostRecordsService)} is stopping")]
+    [LoggerMessage(Level = LogLevel.Information, Message = $"{nameof(TransformBlogPostRecordsJob)} is stopping")]
     private partial void LogTransformStopped();
 
     [LoggerMessage(Level = LogLevel.Information, Message = "Deleting {RecordCount} records from UserRecord-Table")]
diff --git a/src/LinkDotNet.Blog.Web/RegistrationExtensions/BackgroundServiceRegistrationExtensions.cs b/src/LinkDotNet.Blog.Web/RegistrationExtensions/BackgroundServiceRegistrationExtensions.cs
index fc1d8f8c..108304a0 100644
--- a/src/LinkDotNet.Blog.Web/RegistrationExtensions/BackgroundServiceRegistrationExtensions.cs
+++ b/src/LinkDotNet.Blog.Web/RegistrationExtensions/BackgroundServiceRegistrationExtensions.cs
@@ -18,6 +18,6 @@ public static void AddBackgroundServices(this IServiceCollection services)
 
         services.AddNCronJob(p => p.TimerInterval = TimeSpan.FromSeconds(30));
         services.AddCronJob<BlogPostPublisher>(p => p.CronExpression = "* * * * *");
-        services.AddCronJob<TransformBlogPostRecordsService>(p => p.CronExpression = "0 * * * *");
+        services.AddCronJob<TransformBlogPostRecordsJob>(p => p.CronExpression = "0 * * * *");
     }
 }
diff --git a/tests/LinkDotNet.Blog.IntegrationTests/Web/Features/TransformBlogPostRecordsServiceTests.cs b/tests/LinkDotNet.Blog.IntegrationTests/Web/Features/TransformBlogPostRecordsJobTests.cs
similarity index 66%
rename from tests/LinkDotNet.Blog.IntegrationTests/Web/Features/TransformBlogPostRecordsServiceTests.cs
rename to tests/LinkDotNet.Blog.IntegrationTests/Web/Features/TransformBlogPostRecordsJobTests.cs
index 24679e9c..a845de04 100644
--- a/tests/LinkDotNet.Blog.IntegrationTests/Web/Features/TransformBlogPostRecordsServiceTests.cs
+++ b/tests/LinkDotNet.Blog.IntegrationTests/Web/Features/TransformBlogPostRecordsJobTests.cs
@@ -12,24 +12,24 @@
 
 namespace LinkDotNet.Blog.IntegrationTests.Web.Features;
 
-public class TransformBlogPostRecordsServiceTests : SqlDatabaseTestBase<BlogPost>
+public class TransformBlogPostRecordsJobTests : SqlDatabaseTestBase<BlogPost>
 {
-    private readonly TransformBlogPostRecordsService sut;
+    private readonly TransformBlogPostRecordsJob sut;
     private readonly IRepository<BlogPostRecord> blogPostRecordRepository;
     private readonly IRepository<UserRecord> userRecordRepository;
 
-    public TransformBlogPostRecordsServiceTests()
+    public TransformBlogPostRecordsJobTests()
     {
         blogPostRecordRepository =
             new Repository<BlogPostRecord>(DbContextFactory, Substitute.For<ILogger<Repository<BlogPostRecord>>>());
         userRecordRepository =
             new Repository<UserRecord>(DbContextFactory, Substitute.For<ILogger<Repository<UserRecord>>>());
         
-        sut = new TransformBlogPostRecordsService(
+        sut = new TransformBlogPostRecordsJob(
             Repository,
             userRecordRepository,
             blogPostRecordRepository,
-            Substitute.For<ILogger<TransformBlogPostRecordsService>>());
+            Substitute.For<ILogger<TransformBlogPostRecordsJob>>());
     }
     
     [Fact]
@@ -78,4 +78,38 @@ public async Task ShouldTransformRecords()
         post3Record.Should().NotBeNull();
         post3Record.Clicks.Should().Be(1);
     }
+
+    [Fact]
+    public async Task ShouldMergeRecordsWhenThereAreAlreadyEntries()
+    {
+        // Arrange
+        var someDate = new DateOnly(2023, 08, 13);
+        var blogPost = new BlogPostBuilder().WithUpdatedDate(someDate.ToDateTime(default)).Build();
+
+        await Repository.StoreAsync(blogPost);
+        List<UserRecord> userRecords =
+        [
+            new() { Id = "A", DateClicked = someDate, UrlClicked = $"blogPost/{blogPost.Id}" },
+            new() { Id = "B", DateClicked = someDate, UrlClicked = $"blogPost/{blogPost.Id}" },
+            new() { Id = "C", DateClicked = someDate.AddDays(1), UrlClicked = $"blogPost/{blogPost.Id}" },
+        ];
+        await userRecordRepository.StoreBulkAsync(userRecords);
+
+        List<BlogPostRecord> blogPostRecords =
+        [
+            new() { BlogPostId = blogPost.Id, DateClicked = someDate.AddDays(-1), Clicks = 1 },
+            new() { BlogPostId = blogPost.Id, DateClicked = someDate, Clicks = 1 },
+        ];
+        await blogPostRecordRepository.StoreBulkAsync(blogPostRecords);
+        
+        // Act
+        await sut.RunAsync(new(null), default);
+
+        // Assert
+        var records = await blogPostRecordRepository.GetAllAsync();
+        records.Count.Should().Be(3);
+        records[0].Clicks.Should().Be(1);
+        records[1].Clicks.Should().Be(3);
+        records[2].Clicks.Should().Be(1);
+    }
 }