Diagonal beams on collar beams - tongue and groove

Hello forum. I would like to board the attic floor as soon as everything is finished here. For this, I would like to use OSB or tongue and groove boards. Now, there are diagonal beams lying on the collar beams. I thought these would be removed before covering the roof, which has now been done, and only serve for safety as long as the roof is still open. I am attaching a picture, I am currently unable to go up to the attic to take others. How can I now board the attic floor, since these diagonal beams rest on the collar beams and are "in the way" of battens on top? Thanks for any constructive help.

Firstly, use tongue and groove boards, not OSB. Don’t seal the insulation completely. Let the boards breathe a bit. Well, and you probably had to go around those things. Saw? Karsten

I have already read that I should not lay tongue and groove boards or OSB directly on the insulation, right?
With the battens, there would be 5cm of air.

I only know this: We are having our floor laid out completely. During the preliminary discussion, the question arose: tongue and groove boards or OSB. BU said, not OSB, that is too dense. Now they are laying boards. They are already on it. Karsten

I only want to lay the OSB boards, if there are any, up to the middle purlins. Behind that, it remains free with us.