Exact match array

Below is the beginning of my code, the only issue I'm having is that the below list when deleting should only delete on an exact match.
So for example if I have 'carrier name' as a column header and 'carrier name 2' as a column header by the list below only carrier name column should be deleted and carrier name 2 should remain.
Currently the code is deleting both columns.
how do I make this exact match?

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