SQL Server requires that all articles in a publication allowing updatable subscriptions contain a timestamp column used for ...

SQL Server requires that all articles in a publication allowing updatable subscriptions contain a timestamp column used for tracking changes to the replicated data. SQL Server will add a timestamp column to those published tables that do not have one. 

Adding a new column will:
     » Cause INSERT statements without column lists to fail
     » Increase the size of the table 

SQL Server will add a timestamp column to each of the following tables when the publication is created.