Update Cost from the Products module directly

Hi 

I have a 10.0.4 instance and am having an issue 'Cannot Modify Multiple QLIs Without Data Conflict' whcih is a known Sugar Bug (https://portal.sugarondemand.com/#supp_Bugs/82634)

We cannot ugrade this instance yet so was hoping its possible to update the Cost field directly from the QLi (Products module)

From my understanding, the Cost field $cost_price is mapped from the Product Template.

I have tried to modify the readonly flag to false and performed a  Quick Repair and Rebuild but the field wont be readable.

'custom_directory\modules\Products\clients\base\views\record/record.php' 

Any ideas would be greatly appreciated!

5 => 
              array (
                'name' => 'cost_price',
                'type' => 'currency',
				'readonly' => false,  			  
                'related_fields' => 
                array (
                  0 => 'cost_price',
                  1 => 'currency_id',
                  2 => 'base_rate',
                ),
                'convertToBase' => true,
                'showTransactionalAmount' => true,
                'currency_field' => 'currency_id',
                'base_rate_field' => 'base_rate',
              ),