Table Job Task "Cost Completion %" field in 2009 sp1.

Hi Expects,

I have come across a situation, i want to share this and just want to know about how can i solve this,

We have just upgraded from 2009 sp1 to NAV 2013. 

In 2009 sp1 table Job Task Line, the user has used the field "Cost Completion %" to see the difference between the Usage Cost v/s Schedule Cost.

Now when i check in NAV 2013 the field no. 54, field name "Cost completion %", in the Table Job Task is no more.

How to solve this can add a new field for the "Cost Completion%" or there is a change in the functional of COst Completion%.

Thanks

Naveen