diff --git a/DbFirst.Application/Catalogs/CatalogProfile.cs b/DbFirst.Application/Catalogs/CatalogProfile.cs
index d30bd02..ca4bb3a 100644
--- a/DbFirst.Application/Catalogs/CatalogProfile.cs
+++ b/DbFirst.Application/Catalogs/CatalogProfile.cs
@@ -7,7 +7,7 @@ public class CatalogProfile : Profile
 {
     public CatalogProfile()
     {
-        CreateMap<VwmyCatalog, CatalogReadDto>().ReverseMap();
+        CreateMap<VwmyCatalog, CatalogReadDto>();
         CreateMap<CatalogWriteDto, VwmyCatalog>();
     }
 }
diff --git a/DbFirst.Infrastructure/Repositories/CatalogRepository.cs b/DbFirst.Infrastructure/Repositories/CatalogRepository.cs
index 449b446..0227349 100644
--- a/DbFirst.Infrastructure/Repositories/CatalogRepository.cs
+++ b/DbFirst.Infrastructure/Repositories/CatalogRepository.cs
@@ -34,18 +34,12 @@ public class CatalogRepository : ICatalogRepository
 
     public async Task<VwmyCatalog?> UpdateAsync(int id, VwmyCatalog catalog, CancellationToken cancellationToken = default)
     {
-        var exists = await _db.VwmyCatalogs.AsNoTracking().AnyAsync(x => x.Guid == id, cancellationToken);
-        if (!exists)
-        {
-            return null;
-        }
-
         catalog.Guid = id;
 
         var guidParam = new SqlParameter("@GUID", SqlDbType.Int)
         {
-            Direction = ParameterDirection.InputOutput,
-            Value = catalog.Guid == 0 ? DBNull.Value : catalog.Guid
+            Direction = ParameterDirection.Input,
+            Value = id
         };
 
         var catTitleParam = new SqlParameter("@CAT_TITLE", catalog.CatTitle);
@@ -53,17 +47,11 @@ public class CatalogRepository : ICatalogRepository
         var changedWhoParam = new SqlParameter("@CHANGED_WHO", (object?)catalog.ChangedWho ?? DBNull.Value);
 
         await _db.Database.ExecuteSqlRawAsync(
-            "EXEC dbo.PRTBMY_CATALOG_UPDATE @CAT_TITLE, @CAT_STRING, @CHANGED_WHO, @GUID OUTPUT",
+            "EXEC dbo.PRTBMY_CATALOG_UPDATE @CAT_TITLE, @CAT_STRING, @CHANGED_WHO, @GUID",
             parameters: new[] { catTitleParam, catStringParam, changedWhoParam, guidParam },
             cancellationToken: cancellationToken);
 
-        if (guidParam.Value == DBNull.Value)
-        {
-            return null;
-        }
-
-        var guid = (int)guidParam.Value;
-        return await _db.VwmyCatalogs.AsNoTracking().FirstOrDefaultAsync(x => x.Guid == guid, cancellationToken);
+        return await _db.VwmyCatalogs.AsNoTracking().FirstOrDefaultAsync(x => x.Guid == id, cancellationToken);
     }
 
     public async Task<bool> DeleteAsync(int id, CancellationToken cancellationToken = default)