results are not displaying even the device is being monitored

Hey Folks,

i was trying to search the server that was being monitored by the solarwinds but when i tried from managed nodes i am not getting any search results, when i am trying to add the same server it is saying that the server is already being monitored by the other poller.

Solarwinds Details:

Orion Platform 2018.4 HF3, SRM 6.8.0, NPM 12.4, DPAIM 11.1.1, SAM 6.8.0, NetPath 1.1.4

Please help.