Invalid Operation Error


I am trying to create a report and am stumped by this error. I have the exact same data in both columns because it is fake data.

This formula works fine all the way down my column

=IFERROR(AVG(COLLECT({Additional Options}, {Created Week}, [Report Date]@row, {Monitor Type}, "Monitor")), "") / 5

This formula gives me an invalid operations error. Except in the one cell that returns a 1. All other cells should be blank at this point. My columns are the same type. What am I missing

=IFERROR(AVG(COLLECT({Open Ended}, {Created Week}, [Report Date]@row, {Monitor Type}, "Monitor")), "") / 5

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