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I'm getting Violation of PRIMARY KEY constraint when submitting a email address on a landing page. all I am doing is capturing the email address. the data extension is sendable and only contains the email address which is set as the PK. is there a way to check if the email already exists in the data extension.

CODE: SET @Response = InsertDE("DE", "EmailAddress", @EmailAddress)

Any help is appreciated

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updated to upsertDE and it worked

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