Hi Arsalan,
This is because you are using a source storage dimension that allows a blank in receipt or issue. there is a workaround to this.
1- Close all open transactions.
2- Count to 0 the inventory.
3- Perform an inventory close.
4- Change the storage dimension from the product or released product form (Depending on your setting)
5- Complete the WHS settings (Res Hierarchy, Unit seq Groups, ...)
6- Count the inventory to the original quantity
Regards,
Mehdi