Chatflow Selection Via Tracking Code

Hello Everyone,

I have created 2 Chatflows A and B the A is embedded on the WordPress website using Hubspots Plugin and the B I want to embed that on the Codeigniter custom build system the issue I am facing is tracking is not letting me choose which chat flow should appear there. when I am sending message from custom build its showing under inbox that this conversation if started for chatflow A how can I change that to B?

A and B chat flows are set upped and are enabled.

Please guide me.