Help! Salt (I think) line put in walkway outside of my friends trailer.

A friend sent a picture to me of a white line outside of his living space. He has a self proclaimed witch on his property. I have not met her and unsure about the extent of her practice but she talks about it enough that he is intimidated. I practice some magic but this is out of my comfort zone. my intuition has been going OFF about this woman for a while.

She is slightly in love with him and they briefly had sexual relations. He ended this aspect of their relationship to be friends and there are definitely hard feelings on her end.

The line is in the dirt on a walkway, he has no choice but to walk over. He already walked over it.

What are the possibilities of what this could be? I can’t post a picture of it in this particular subreddit. It seems like a large line of salt.

How can he negate any of this rituals effects? Can he add something over the existing salt line?

And what can he do to protect himself from black magic? Is there anything he can do to help? I feel it’s either malicious or a love spell of some sort. He’s been feeling off.

Please let me know your thoughts! This man has been through a lot and doesn’t deserve any more negativity in his life. I don’t personally do malicious spells or even love spells, I keep my energy and intention to ancestors and offerings. So this is uncharted water for me.