Description
The centroid for the zone specified in <value1> is at the same coordinate location (is coincident to) as that of the zone specified in <value2>. Since only one location can be maintained, this message is provided to indicate such. The value of the centroid location will assume that of the lowest zone value.
Solution
If the result is for some reason undesirable, you could edit some of the cell values of the input raster in such a way that the zonal centroids are no longer coincident.