How to remove template photos

Replaced images with ones I want on template, however, when I deleted the original photos it removed the ones I posted. Do I try to delete the original ones from the same place I added mine? Do I use the ‘select’ button to do so? CMS

Forgot to add: https://preview.webflow.com/preview/kbg-7b6b3b?utm_medium=preview_link&utm_source=designer&utm_content=kbg-7b6b3b&preview=e4d1dad5f8f0d79f6d5ed4235f151489&mode=preview