Default value indicator Unlimited in Purchase Order

If I create Purchase order without Material Master where the account category is K (Cost Centre) and Item Category is D (Service), the indicator Unlimited is default ticked.

But when a second line has been added to the Purchase Order without material master and only account category K the indicator Unlimited is not ticked on.

After analysing in the IMG I could not find if this can be configured.

Is it possible to configure the default setting of the indicator Unlimited in Purchase Order?