inventory adaptation when manual order entry

[Heidi Dehaes - Olagos]

Hello,

When i give a manual order entry, i have at a certain moment, after entering
all the products, i have to click on the button "reserve inventory" and
choosing priority "normal", "low", or "high".

But nothing is modified in the inventory amounts.

What is the error i do?

Does someone know that?

regards,
Heidi