You need to get all of your users out of ASC and run the Recalculate Stock Usage option.
On the Main Menu Select Stock
Click on Product Updates and on the dropdown select Item Master Mass Change
Pick the Special Updates option
Press the Recalculate Stock Usage radio button, then Save
You can then use selection criteria to run it for certain parts or leave it blank to do it for everything, then Save
It will then report how many records will be updated, click on OK
You will then get a message OK to update and the number of parts
If you are happy to proceed select Yes, otherwise No
Process Complete message click on OK
