Error while posting differences for 2nd item of TO

I have created a TO with 3 line items , which are 3 handling units and storage units.

Now via LM02, I am trying to confirm the TO with differences.

For 1st line item, say for example, 100 qty was target qty and i confirmed actual qty as 80 and differences of 20.

Now for 2nd item with same quantity , if I am trying to confirm the same way, its giving error saying ,

''For TO item2, the target HU has to match the target storage unit".

This error is coming for all TOs when trying to post with differences.

1st item is getting posted successfully though.

Please advice.

Thanks,