Working with multiple scenes

Hello community, I am new to Vuforia and I am trying to build AR booklet with multiple images using Vuforia 10-6-3 image target. I have 7 scenes for 7 different images(when i put them in one scene the app got crashed so i decided to separate the scenes) and each scene have their own image target. The problem is that before I load other scenes their image targets are working. I want to activate image target only in the selected scene and deactivate all others. How can i do that? Thank you!