P1-DK was a maintenance droid in the Sub-levels of the Telos IV military base in the aftermath of the Jedi Civil War. P1-DK was reactivated by HK-47 during his attack on the HK Factory. P1-DK operated on HK-47s self-preservation program to allow him to stop being one of the HK-50 units, allowing him to attack and harm the duplicates.