Editing the basic rate of Stock Entry Item does not persist and reverts back to original valuation rate

I am creating Manufacture type stock entries. When inputting item code the basic rate of the item automatically appears as it’s calculated on weighted average of inventory.

However I want to be able to edit the basic rate of every individual item in the Item Table of Stock Entry. While the field is editable, when I try to save the document before submitting the valuation of the items goes back to the old weighted average rate of inventory calculated by the system.

How can I ensure that the rate that I input is the rate that is saved and submitted for that item?

i have the same problem