Who hacked my linkedin and added this person? I did not add.

For 1 year, all networks offered me to add this person (Linkedin, Twitter, Facebook). I didn't do it. They hacked Linkedin and added this person to me. I didn't do it.
I do not see her in my profile. Only you see it!

If I press a button "see all", I see it (I accidentally discovered). I do not know how to remove it.

Ph.D. Natalia Petrovskaya