Unable to use unitary event with a different namespace other than the namespace of read audience in my journey

[Phani_Rajesh_Reddy_Manam]

Hello everyone, 

I have a use case where i want to use unitary event inside my journey, but am unable to use my unitary event created because of the below limitation. 

My journey has a read audience with namespace selected as HCPREFID a unique identifier and unitary event has namespace selected Email (because the schema am using i.e.,

AJO Email Tracking Experience Event Dataset

 to create unitary event doesn't have HCPREFID field). But profile is getting stitched.

[DavidKangni]

@Phani_Rajesh_Reddy_Manam 

namespace needs to be the same. it's a guardrail.

Thanks,

David