Cannot add “rowversion” data type in sql server 2008 r2 management studio, or even to modify existing column data type [duplicate]

This question already has an answer here:

• Microsoft recommends using Rowversion over timestamp , but i can not find “rowversion” data type inside my sql server 2008 R2 2 answers

I want to create a column with Rowversion data type, but inside my SQL Server 2008 R2 Management Studio, I cannot find such a data type:

Also when I tried altering existing column named timestamp which is of type timestamp using this statement:

ALTER TABLE [SkillManagement].[dbo].[Customer]
ALTER COLUMN timestamp rowversion 

I get this error:

Msg 4927, Level 16, State 1, Line 1

Cannot alter column 'timestamp' to be data type timestamp

Can anyone advise?