How to avoid Lead Source is assigned "Chat" status

How to avoid Lead Source is assigned "Chat" status

We are using the field Lead Source to identify where our customers originate from. And we do not want it to automatically be set to "Chat" when we are chatting with a customer that we have engaged with using e-mail Chat is just a next step.

Is there a way to avoid that the Lead Source field is automatically assigned the value "Chat"?