How to re-incorporate A1 Material Cost in the Work Order ?

Hi,

For an Manufacturing Item due to improper cost roll up, initially A1 Material Cost was not considered in F30026 - Cost Components. Work Order has been created, Issued and Completed. In lieu of missing A1 Material Cost, its showing material variance for the above work order.

In further to the above, after the corrections were carried out of the same item and roll up again and now the A1 Material Cost has been arrived in the F30026.

We want to re-process the same work order to avoid material variances.

What is the best way to do it ? How can we proceed further in this regard ?