Correlating with two different schemas

Scenario:
I have a Message which should be sent to confirmation after confirmation it occurs in a folder
but the type of the message is changed

Solution:
so schema of the sent message is
and after confirmation the schema will be

So we are unable to correlate Field1PK with Field3PK if we use promotion with default settings

While promoting Field3PK set its name to Field1PK like



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