Question: I want to configure Python/Jython in IBM BPM, so that these files can directly executed from process app. How can I do that?
How to setup this entry in WebSphere Application Server?

Answer: 
You can use the same key and then just insert the new bin. This will update the existing record with the new bin. The way you are proceeding about it is correct.
As per Aerospike [documentation](https://www.aerospike.com/docs/guide/single.html), behaviour of update and replace is mentioned below:

**update** : If the record exists, then add or update the specified bins. Bins that are not specified, will remain intact.

**replace** : If the record exists, then write the specified bins, replacing all prexisting bins.

Therefore, if you just specify the third bin, it will work. It will also work if you specify all three bins and make update or replace call.