In version 7:
 
     
    • Create a constituent query of the constituents to change
       
    • Click Admin, Globally Change Records
    • Double-click Constituent under the Constituent category
    • Click Include and choose Selected Constituents. Browse to and select the query created in step 1.
       
    • In the Show field, select Biographical
    • From the list of Available Fields, select Constituent ID and click Select
    • Select Delete as the Operation. In the Delete field, enter the number of asterisks (*) for the number of digits in the constituent ID and mark the Use Pattern Matching checkbox. For example, if your constituent IDs contain 6 numbers, type 6 asterisks (******)
    • Click Change Now