Driving a status from a RYG ball

I'm working on creating a status column that is driven by changes in other columns in the same row. I'm attempting to integrate a RYG ball into one of those driver columns that would affect the status only if the ball is set to red.

This is my current formula:

=IF(ISBLANK([Asset]@row), "", IF(ISDATE([Check-Out]@row), "Checked-Out", IF([Due]@row < TODAY(), "OVERDUE", IF([Condition]@row = "Red", "Unavailable", "Checked-In"))))

but it's returning an #INVALID OPERATION error, and I'm wondering if it's because of the ball status driver.


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