Hello,
I think that uProduce is only surprised that your User View has a Field (does it?), but you don't use it later in any Content Object, etc. After all, it's only a Warning, that should not prevent you from running.
On another note: if the purpose of your User View is only to be "counted" by your "RowCount" QLingo function, maybe you would want to make that a little simpler (for the sake of better performance and less resource consumption), by simply coding a "counting" SQL query, such as
SELECT COUNT([ID]) AS myNumberOfRows FROM [XMPDBHDS].[XMPieHDSSchema23272].[Sheet1]
directly in your Content Object code - no User View, no RowCount any more.