MySQL Error Occurred

Error Message:
1054: Unknown column 'I.productWeight' in 'field list'

SQL:
SELECT DISTINCT(I.productId), C.cat_id, I.productCode, I.productWeight, I.description, I.image, I.Size, I.AppxWeight, I.Compound, I.SuggestedTube, I.MeasuringRim, I.SidewallWidth, I.TreadWidth, I.OverallDiameter, I.Circ, I.BoltCircle, I.BackSpacing, I.BeadLock, I.Polished, I.Black, I.Gold, I.price, I.name, I.popularity, I.sale_price, I.stock_level, I.useStockLevel FROM CubeCart_cats_idx AS C INNER JOIN CubeCart_inventory AS I ON C.productId = I.productId WHERE I.disabled = '0' AND I.sale_price != 0 AND C.cat_id > 0 GROUP BY I.productId