Go to Manager & then go to Plant Config:
1-Choose Work Centres
2-Find the Specific Work Centre by searching for it like *Training IT* --- (Note the special character *)
3-Open the Work Centre
4>Click on OPC Properties
5-Click on "Update"
6-Change "Allow Override of Count" to "YES"
7-Click On "Save"
8-Find the specified or affected order by opening the Work Center under Plant watch and choose "Previous"
9-Choose "Input Quantity"
10-Input the needed "Counts"
11-Save
12-Once done, go back to Manager and change "Allow Override of Count" to "NO" & Save.(Leaving that value as YES can affect re-processing of counts)