extra data for pivot table
 

Hi I have a pivot table that I have named a few extra columns as spare1
spare2 etc. These will be used for future categories in which we may want
to use for data. I have dragged these over to the pivot table however when
I change the name on the master sheet where the pivot range is defined the
data field originally called spare1 (now called "training extras") dragged
over to the data field is removed from the data.

Is there a way that I can keep the field in the data area if I change Spare1
title to another name on the pivot range?

Any help is appreciated

Thanks