When you pre-apply a probe, the Probekit instrumentation engine inserts probe code and calls to the probe's classes into your application's class files. You can remove probe instrumentation when you no longer want to collect probe data. When you modify a probe that was pre-applied, you must remove the instrumentation before you can re-apply the probe.
Parent topic: Collecting Probe Data Outside of the Workbench
Related tasks
Pre-applying a Probe