Hello A couple times a year I run a giveaway campaign in order to grow my email list. I usually end up getting a few of my repeat customers, that are already on my email list, entering the giveaway. When they enter this new giveaway list all of their previously collected information (mainly their mailing address for sending orders) is lost. Is there something I can change in my setting so I can merge a contacts information each time they subscribe to a list rather that have it overridden?
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