Table Blocking

Can anyone help me with this? Currently I’m working on Phys. Inventory Journal. Under Functions, there is Calculate Inventory. I have run 2 session of Calculate Inventory with different Batch Name. However, the 2nd session would need to wait for the 1st session to complete before it can proceed. I understand this is due to table blocking. Am wondering does anyone know whether how i can avoid/minimize this block? Thank you.

probably there is a Locking used and there is for sure a good reason for that… unless someone unexpirienced has made some changes