revaluation to cost error entry not completely invoiced how

Can any one answer to me to this question if possible

I have item as spare part .transaction that made in it as entry type purchase i notice wrong in quantity and and unit cost and unit measure so that i made as following

1- adjustment inventory to 0

2- revaluation to all entries to 0

3-adjust cost-item entries

i run valuation report (1001)i notice cost is -74

why this value come as negative value although inventory is 0

I have one entry not completely invoiced when i make revaluation to it to 0 it told me it not completely invoiced to reevaluate

How i make it completely invoiced