SCCM 2007: delete Inactive Client Discovery Data?

Hi,

We migrated clients from SCCM 2007 to SCCM 2012.
We need to speed up the process of deleting inactive clients (not many should be there).

The link below, tells us that the "delete inactive client discovery data" task can do this job but only does it every 90 days.
http://technet.microsoft.com/en-us/library/bb693646.aspx

Can we set this schedule to delete discovery data older then f.e. 1 week and run it safely? Inactive clients that  would be deleted erroneously would reconnect without any issue(?)

Pls advise.
J.

Jan Hoedt