This is the list of features with truncated neighbors because the number of neighbors exceeded the specified maximum value.
This warning is informational only. This message is triggered when the maxNumberOfNeighbors variable has been changed from None to a specific threshold value. The number of neighbors for features exceeding the threshold will be truncated. You can modify this behavior by setting the warnNumberOfNeighbors and/or maxNumberOfNeighbors variables in <ArcGIS>/ArcToolbox/Scripts/WeightsUtilities.py. By default, the warnNumberOfNeighbors variable is set to 1000 and the maxNumberOfNeighbors variable is set to None.