PA52/PA54 Error Message: Work Count on history but not on action

Hi All.

I'm a novice user of Lawson. I am working on reversing a JOB_CHANGE action via PA52.1, however when I try and process I get the error "Work County on history but not on action".
On the PA52 this field is not listed under any of the Selected Items tabs. On the HR54.1, when I view data item 769 (work county) there is a blank history line that says it was changed by a personnel action with the same effective date of the action I am trying to reverse, so I am not able to add/or change the value there.
When I locate the action on PA54.1 the field is listed (blank) and when I try and change the information it says "Can't process chg; most recent history will differ from emp."

HELP