Removed LUNs still showing on one FC path

Hi,

     I have a vmware cluster with 4 hosts running ESXi 5 upd2. Recently i have removed some LUNs and i have noticed that in the Storage Adapters section, for two hosts, on one FC card on each host, down in the DEVICE view, it still remembers the old LUNs. They show as DEAD OR ERROR, but they are still there. This does not happen with the other 2 hosts. What could be the reason for this?

    Thank you.