Transact SQL :: Swap Values In 2 Rows Based On Primary Key

I need swapping values in rows of tables based on primary.

I will explain my scenario with the below example.

ID          Name                  Value   
---         --------                -------- 

1            name1                 202
2            name1                 203
3             name2                203
4             name2                202
5             name3                204

In the above example, I want to swap Value 202 and 203 but its not straight forward. I want to swap in a way that, I need to group by Name column and check if 203 comes first in the group then swap else don't.

In the above example, I need to swap the values for name2 but not for name1. Below query is performing a straight forward swap.

UPDATE TblTest
SET Value
=
CASE
WHEN
Value
=202
THEN203
ELSE202
END

WHERE
Valuein(202,203)