Diagnosis
A number of objects have already been classified with the samecharacteristic values. In class maintenance, you have defined that awarning message appears in this case. This draws your attention to thepossibility of redundancy.

Procedure
Check the values assigned to the characteristic.
If you do not change the values, you are deliberately allowingredundancy. However, the object to be classified may not be necessary,because it can be replaced by the objects that already exist.