Available with Standard or Advanced license.
The raster statistics of the mosaic dataset item indicate that the raster's radiometric range might be too low for the pixel type defined for the mosaic dataset.
There are one or more mosaic dataset items that have statistics that are in a value range smaller than that of the mosaic dataset.
In the Stretch function, make sure that the output value range matches the value range of the mosaic dataset. Using the Batch Edit Raster Functions wizard to insert or edit the Stretch function can be helpful.