[{_id:12345678901,name:"Peter Parker",profession:"Superhero"},{_id:12345678902,name:"Peter Parker",profession:"Journalist"},{_id:12345678903,name:"Hulk",profession:"Software Developer"}]

db.collection.update({"name":{"$regex":"Peter Parker"}},[{"$set":{"name":{"$replaceAll":{"input":"$name","find":"Peter Parker","replacement":"Superman"}}}}],{"multi":true})