String or binary data would be truncated. The statement has been terminated

I have met some problem with the SQL server, this is the function I created:

ALTER FUNCTION [dbo].[testing1](@price int)
RETURNS @trackingItems1 TABLE (
   item       nvarchar  NULL,
   warehouse   nvarchar NULL,
   price int   NULL
) 
AS
BEGIN
   INSERT INTO @trackingItems1(item, warehouse, price)
   SELECT ta.item, ta.warehouse, ta.price 
   FROM   stock ta
   WHERE  ta.price >= @price; 

   RETURN;
END;

When I write a query to use that function like the following it getting the error

String or binary data would be truncated. The statement has been terminated

How can I fix this problem?

select * from testing1(2)

This is the way I create the table

CREATE TABLE stock(item       nvarchar(50) NULL,
                   warehouse   nvarchar(50) NULL,
                   price int NULL);