diff --git a/DbFirst.Infrastructure/Repositories/CatalogRepository.cs b/DbFirst.Infrastructure/Repositories/CatalogRepository.cs
index f37ed80..37e8d0a 100644
--- a/DbFirst.Infrastructure/Repositories/CatalogRepository.cs
+++ b/DbFirst.Infrastructure/Repositories/CatalogRepository.cs
@@ -62,8 +62,7 @@ public class CatalogRepository : ICatalogRepository
 
         var guidParam = new SqlParameter("@GUID", SqlDbType.Int)
         {
-            Direction = ParameterDirection.Input,
-            Value = id
+            Direction = ParameterDirection.Output
         };
 
         var catTitleParam = new SqlParameter("@CAT_TITLE", catalog.CatTitle);
@@ -71,11 +70,22 @@ 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",
+            "EXEC dbo.PRTBMY_CATALOG_UPDATE @CAT_TITLE, @CAT_STRING, @CHANGED_WHO, @GUID OUTPUT",
             parameters: new[] { catTitleParam, catStringParam, changedWhoParam, guidParam },
             cancellationToken: cancellationToken);
 
-        return await _db.VwmyCatalogs.AsNoTracking().FirstOrDefaultAsync(x => x.Guid == id, cancellationToken);
+        if (guidParam.Value == DBNull.Value)
+        {
+            return null;
+        }
+
+        var guid = (int)guidParam.Value;
+        if (guid == 0)
+        {
+            return null;
+        }
+
+        return await _db.VwmyCatalogs.AsNoTracking().FirstOrDefaultAsync(x => x.Guid == guid, cancellationToken);
     }
 
     public async Task<bool> DeleteAsync(int id, CancellationToken cancellationToken = default)