Sq Off Order quantity

Kindly add a option that Sq off order quantity can be higher than current position size

Example-> I have -1lot SIlverM Fut at 92000
I want to go long at 89000
So I want to place a buy order for 2 lots silverm fut at 89000

But when I click on the squareoff button, it says quantity should be equal to existing quantity.
Kindly change this, so that quantity in square off order can also be more than existing quantity, or alternately add option to reverse position at specific price.