How do I disable my Lock Screen message on BlackBerry 10?

Recently my BlackBerry Z10 was stolen I immediately I trace my phone with the help of blackberry protection ID and written some message in display message in blackberry protection ID now I got my phone but the problem is that I want delete that message in my phone even time I swipe to lock my screen it showing so plz help me

Tap Settings followed by Security and Privacy
Tap Lock Screen
You'll see the message in the Lock Screen Message field.

Remove it.

Additionally, you can login to the BlackBerry Protect site and remove it.

https://protect.blackberry.com