diff --git a/AsbCloudInfrastructure/Repository/CrudRepositoryBase.cs b/AsbCloudInfrastructure/Repository/CrudRepositoryBase.cs
index f5d11f38..900e181c 100644
--- a/AsbCloudInfrastructure/Repository/CrudRepositoryBase.cs
+++ b/AsbCloudInfrastructure/Repository/CrudRepositoryBase.cs
@@ -7,6 +7,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
+using AsbCloudApp.Exceptions;
 using Microsoft.EntityFrameworkCore.ChangeTracking;
 
 namespace AsbCloudInfrastructure.Repository
@@ -120,15 +121,26 @@ namespace AsbCloudInfrastructure.Repository
         {
             if (!dtos.Any())
                 return 0;
-		
-            var ids = dtos.Select(d => d.Id);
-
-            var countExistingEntities = await dbSet
-                .Where(d => ids.Contains(d.Id))
+            
+            var ids = dtos
+                .Select(o => o.Id)
+                .Distinct()
+                .ToArray();
+            
+            if (ids.Any(id => id == default))
+                throw new ArgumentInvalidException(nameof(dtos), "Все записи должны иметь Id");
+            
+            if (ids.Length != dtos.Count())
+                throw new ArgumentInvalidException(nameof(dtos), "Все записи должны иметь уникальные Id");
+            
+            var dbSet = dbContext.Set<TEntity>();
+            
+            var existingEntitiesCount = await dbSet
+                .Where(o => ids.Contains(o.Id))
                 .CountAsync(token);
-
-            if (ids.Count() > countExistingEntities)
-                return ICrudRepository<TDto>.ErrorIdNotFound;
+            
+            if (ids.Length != existingEntitiesCount)
+                throw new ArgumentInvalidException(nameof(dtos), "Все записи должны существовать в БД");
             
             var entities = dtos.Select(Convert);
             var entries = entities.Select(entity => dbSet.Update(entity)).Cast<EntityEntry>().ToList();
@@ -145,9 +157,8 @@ namespace AsbCloudInfrastructure.Repository
                 .FirstOrDefault(e => e.Id == id);
             if (entity == default)
                 return Task.FromResult(ICrudRepository<TDto>.ErrorIdNotFound);
-            var entry = dbSet.Remove(entity);
+            dbSet.Remove(entity);
             var affected = dbContext.SaveChangesAsync(token);
-            entry.State = EntityState.Detached;
             return affected;
         }
 
@@ -164,10 +175,8 @@ namespace AsbCloudInfrastructure.Repository
                 return ICrudRepository<TDto>.ErrorIdNotFound;
             
             var entities = dbContext.Set<TEntity>().Where(e => ids.Contains(e.Id));
-            var entries = entities.Select(entity => dbSet.Remove(entity)).Cast<EntityEntry>().ToList();
-            var affected = await dbContext.SaveChangesAsync(token);
-            entries.ForEach(e => e.State = EntityState.Detached);
-            return affected;
+            dbContext.Set<TEntity>().RemoveRange(entities);
+            return await dbContext.SaveChangesAsync(token);
         }
 
         protected virtual TDto Convert(TEntity src) => src.Adapt<TDto>();