This topic is a NetBackup Enterprise Server topic.
The hosts that you selected to scan do not agree on which host stores global device information.
The likely cause of the conflict is one or more NetBackup 5.x media servers that are configured as global device database host(s).
A single NetBackup server must store the device configuration information; that server is known as the EMM server. By default, the NetBackup master server is also the EMM server.
However, more than one host may have been designated as a global device database host or EMM server. This problem can occur if you have multiple master servers or you installed or upgraded the media servers before the master server.
To correct this problem, specify a single device information host.