Clustered column chart (primary and secondary axis)

Hello,

I have a problem in the alignment of four column in clustered column chart. Two of the columns are on the primary axis (blue and red) and two columns are on the secondary axis (purple and green).

The problem is the columns with the secondary axis overlap with the column in the primary axis as you can see in the picture. I tried different options with the gap% and overlap%, no success. I want the four column to be adjacent to each other without overlapping and without gap between the columns in the same category.

Thanks for your help.