How to convert string to JSON.parse in mongo compass or mongoshell

I have a collection name Netflix which has a field name genres. I need to convert the genres string data type to JSON.parse in mongo compass. the data look like below here the field genres look like string but the data field genres must look like this after conversion

I have tried '''db.netflix.find({}).forEach(function(x) {x.genres=JSON.parse(x.genres); db.netflix.save(x);});''' but it is throwing an error. ERROR: TypeError: db.asst.save is not a function