I have ran into this when I am testing several different iApps, upgraded the big-ip several times, or reconfigured the iapp a bunch. You can shut off strictness and delete the noted objects. Once the object noted is gone the iapp should delete ok. Another approach is to open your configuration file and delete the noted item(s), save it, and reload. Once the object is gone you should be able to delete the iApp service. Make sure you save a ucs prior in case you get yourself in a position where the configuration will not load.