I have a Journey where it does a decision split based on a Data Extension Contract Type Field= "Commercial". I am using the "Contact data" evaluation option.
I have a primary key based on the ContractID, so it is unique and will only be present in the data once, however a person may be in the data extension multiple times in a year's period with different Contract IDs.
I have 1:N between CustomerDE and ContractDE in Attribute Group.
How should I use attribute-to-attribute comparison in decision splits?