I have two sheets.

Sheet 1 has two columns:
1. Code_Descr (example value: "12345_cookies")
2. Attribute_ID (empty)

Sheet 2 has 4 columns:
1. Code (example value: 12345)
2. Descr (example value: "Nr-cookies")
3. Code_Descr (formula: =A2&"_"&B2)
4. Attribute_ID (example value: "BHU340098")

The idea is to fill the column Attribute_ID in sheet 1 with the values from
sheet 2. But there is a problem.
As you can see the Descr-values in both sheets are slightly different.
That is because they are from different sources.

I want to use a VLOOKUP to put the Attribute_ID
This is the formula placed on sheet1 in cell C2:
=vlookup(B2;Sheet2!$C:$D;2;0)

I don't get values now... because column Sheet2!C contains a formula.
But I do not want to remove this formula.
My users have to modify Sheet2!B2 from "Nr-cookies" to "cookies" and then
the vlookup should place the correct Attribute_ID in Sheet1.

How do I keep the formula in Sheet2 column C and still get a working VLOOKUP
based on that column?