I came into this situation as the was CI with two way relation
CI1 (Network Device 1)
-connected to CI2 (Network device 2) and
CI2 (Network Device 2)
-connected to CI1 (Network device 1)
Those connection were not visible on Table and Tree, but in graph they were shown.
I deleted the CI1 and and created new CI with connection to CI2 (Network DEvice 2).
After that Tree and Table View Network device list is empty. However Netowork CI's are shown in Graph.
I think that there is some consistency problem...
Could you please mail some help to tomi @ lind.fi