Dust sensor remove

Hello everybody!
I tried to use Mocha Pro to remove some sensor dust on my footage but without good results. To make you understand the problem better, this is the link to see the footage:

Link: https://vimeo.com/204911452
Password: Final

When I use the remove tool it works well up to a certain point; then there are some artifacts like this on the image:

How I can solve it? Thank you very much!!