An additional entry of PATROL Agent can be seen in the disconnected state

When you move a PATROL Agent from one TrueSight Infrastructure Management Server to another TrueSight Infrastructure Management Server, you can see the entry for the PATROL Agent under the new TrueSight Infrastructure Management Server in the Administration console. However, you can also see an additional entry of the PATROL Agent in the disconnected state under the first TrueSight Infrastructure Management Server. You must manually delete the additional entry of the PATROL Agent.