sql server

create view
t11
as select * from
[AdventureWorksLT2012].[SalesLT].[Customer] a
inner join  [AdventureWorksLT2012].[SalesLT].[CustomerAddress] b on a.CustomerID
= b.CustomerID
where lastname like 'V%';

receiving errors as:Msg 4506, Level 16, State 1, Procedure t11, Line 4
Column names in each view or function must be unique. Column name 'CustomerID' in view or function 't11' is specified more than once.