Physical Invetory adjustment allows Secondary quantity to go negative

I performed a physical inventory count.  The primary counted
quantity was less than the system quantity on hand.  The secondary counted
quantity entered was greater than secondary quantity on hand.  When the
physical adjustment posted, it drove the secondary quantity on hand
negative.  I expected the adjustment to fail or not be allowed to be
approved.

We use OPM so I will also posted this in that community.