Custom Operators Warning regarding droping of a field.

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I have a custom operator where I read in certain field(s) and perform certain operations on said field. I keep getting the below warning message and am not sure what exactly it means. Does it have to do with the input column having the same name as the output column? Is there a work around?

CstOplssimix: When checking operator: Dropping component "LOCNM" because of a prior component with the same name.