Hello,

Please let me know the steps to reproduce the issue on demo.

Thank you

To be honest i have no idea how thats happend, and its not always happend. Im still using over selling method. And i notice something with over selling method, when i change my product cost and tried to sell it with the new product cost but in the database table "sma_wharehous_product" the avg cost is not updated.

Hello,

So you are using the AVCO. It shouldn't set the avg. cost to -ve. The avg. cost won't change unless you make purchase. Changing the cost will have no effect on previous purchases and avg. cost. Once you added purchase with new cost then avg. cost should be updated.

I will try to check the avg. cost but if find any thing that could help me find the cause, please update me.

Thank you