Planned Independent Requirements reduction

[SteevesSegura]

Dear Gurus

Here is the context of my concern...
I've got one Sales order type that reduces Planned Independent Requirements.
I've got another Sales order type that doesn't reduce Planned Independent Requirements.

I'm trying to understand the settings that triggers PIR reducing.

I've investigated all the parameters listed below and aligned the second Sales order with the first one… in vain.

Do you have any idea of what I did wrong or what I didn't look at?

Thank you for your help.

MM03: View MRP1 > Strategy group

SPRO:

Sales and Distribution > Basic Functions > Availability Check and Transfer of Requirements > Transfer of Requirements > Classes, Types

Sales and Distribution > Sales > Sales Documents > Schedule lines