Disjoint Groups Sudoku (Mini Sudoku Series #69)

At one time Disjoint Groups Sudoku was one of the feared Sudoku types. Now slowly I am getting comfortable with this puzzle type. This is the spare puzzle that I created for Sudoku Mahabharat 2016 Twisted Classics round. However, this Sudoku was not used. This is an easy puzzle. However, it cannot be fully solved with Classic Rules. One needs to apply the Disjoint Groups Sudoku rules at least once to solve this Sudoku. This Sudoku can be good practice for kids to get to know the rules of this Sudoku type.

This Disjoint Groups Sudoku I am posting in Mini Sudoku Series as 69th Sudoku in this series. Can you solve this Mini Sudoku puzzle?

Rules of Disjoint Groups Sudoku

Mini Classic Sudoku Rules apply. Additionally, cells with the same position in 3x2 boxes contain numbers from 1 to 6 i.e no number can repeat in the same position in 3x2 boxes.