You are on Search Head Cluster and the behavior described here has been identified as Splunk Bug #
SPL-98917/ SPL-99099:[SHPNEXT] to figure out a way to migrate private user assets into a search head cluster such that they can be deleted, moved, shared, etc
This Bug is expected to be fixed in Splunk release 6.2.4, in the mean time please log a Support Case an Support has script to fix this issue.
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