{"Error":"An error occurred while updating the entries. See the inner exception for details.","StackTrace":"   at Microsoft.EntityFrameworkCore.Update.ReaderModificationCommandBatch.ExecuteAsync(IRelationalConnection connection, CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.Update.Internal.BatchExecutor.ExecuteAsync(IEnumerable\u00601 commandBatches, IRelationalConnection connection, CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.Update.Internal.BatchExecutor.ExecuteAsync(IEnumerable\u00601 commandBatches, IRelationalConnection connection, CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChangesAsync(IList\u00601 entriesToSave, CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.ChangeTracking.Internal.StateManager.SaveChangesAsync(DbContext _, Boolean acceptAllChangesOnSuccess, CancellationToken cancellationToken)\n   at Npgsql.EntityFrameworkCore.PostgreSQL.Storage.Internal.NpgsqlExecutionStrategy.ExecuteAsync[TState,TResult](TState state, Func\u00604 operation, Func\u00604 verifySucceeded, CancellationToken cancellationToken)\n   at Microsoft.EntityFrameworkCore.DbContext.SaveChangesAsync(Boolean acceptAllChangesOnSuccess, CancellationToken cancellationToken)\n   at Bulev.PostgreSQL.Storage.SaveAsync() in E:\\_disk c\\_work\\_projects\\ZigZagDom\\PostgreSQL\\Storage.cs:line 44\n   at Bulev.Library.Repository\u00602.SaveAsync(T item) in E:\\_disk c\\_work\\_projects\\ZigZagDom\\Bulev.Library\\Bulev.Library\\Repositories\\Repository.cs:line 130\n   at Bulev.Library.Orders.CartsRepository.AddAsync(Sessions session, Int64 productid, Int32 count) in E:\\_disk c\\_work\\_projects\\ZigZagDom\\Bulev.Library.Orders\\Bulev.Library.Orders\\Repositories\\CartsRepository.cs:line 69\n   at Bulev.Library.Orders.CartsIM.AddJsonAsync(BaseController controller) in E:\\_disk c\\_work\\_projects\\ZigZagDom\\Bulev.Library.Orders\\Bulev.Library.Orders\\Models\\Carts.cs:line 84"}