By Tony Owusu Inventory issues are forcing major retailers to lower prices to clear backed up product. It’s a buyers market. Cannabis companies in the U.S. and Canada are turning to discounting their products to reduce inventories as the burgeoning marijuana market starts to get crowded with new players. A growing number of adult-use brands and products are available to retailers, leading to aging inventories, Krista Raymer of cannabis consulting firm Vetrina Group told MJBizDaily. The combined discount on mainly recreational cannabis sales in nine U.S. states (Arizona, California, Colorado, I…