What does negative inventory mean?

Negative inventory indicates that a Scout marked an order as delivered without the product being assigned to them in the system. 

Steps to correct:

1) Check with the Scout whether they delivered the product or if they accidentally marked it delivered. 

2) If they did deliver, you should transfer the product to them in the system to remove the negative. See How do I manage my Scouts' wagon inventory?

3) If they mismarked it, the Scout or the unit leader can change the status to undelivered. See How do I change an order from delivered to undelivered or vice versa?