Available with Standard or Advanced license.
The mosaic dataset item references a thematic raster with pyramids built using a resampling method other than nearest neighbor.
The current mosaic dataset has one or more mosaic dataset items that are thematic, but are using either bilinear interpolation or cubic convolution pyramids.
Thematic rasters use discrete data values and should not be interpolated to contain new values, which may not exist in the classification.
Use the Build Pyramids And Statistics tool on the associated mosaic dataset items. When running the tool, be sure to turn off the calculation of statistics, and set the pyramid resampling method to Nearest Neighbor.