Clustering a variable based on another variable or set of variables

First of all, clustering is used only for numeric values, especially for continuous values. What you are trying to do here is to cluster a categorical variable, that too an ID column. I'm unsure about the goal but this is not a good technique to cluster values.

That being said, I'm not sure how many unique entries you have in the ID column. You have to convert it into categorical numbers before clustering. Then take only the ID column and the CRPO_VDNN column and use KNN to cluster. You can set the number of clusters in the KNN too.