Error 90062

Column \"{0}\" conflicts with column \"{1}\" so the values in column \"{0}\" were ignored.

(Warning) When two columns in a feed share the same attribute only one of the two columns in the record can have a value. If column 1  conflicts with column 2, the values in column 1 will be ignored. Provide a value for only one of the two columns in the record, and resubmit your feed.