[Bug][Art Gallery Block] Image template indexes on front-end don't match with the back-end ones

[IceStorman]

Environment: All
Reproducible: alsways

Steps to reproduce

1. Go to the admin panel
2. Go to the new streetcode page
3. Choose template in art gallery block
4. Try to create streetcode

Actual result
Streetcode wouldn't be created due to mismatch of images in art gallery with template

Expected result
Streetcode should be created