AWS Hana: possible to change hostname?

We changed the hostname on the AWS Hana instance from hanaserver to something else and got this error later:

[20263]{0}[0] 2013-06-19 14:24:32.608019 e TrexNet   

Communication.cpp(00966) : failed to resolve hanaserver. reason: host unknown

[20263]{0}[0] 2013-06-19 14:24:32.608076 e TNS          TNSClient.cpp(00695) : sendRequest setactive to hanaserver:30001 failed with NetException. data=(S)host=hanaserver|port=30002|tenant=|(I)type=2|(B)watchdog=0|(N)node=|pid=20263|activated_at=2013-06-19 14:24:27.574|...|

[20263]{0}[0] 2013-06-19 14:24:32.608086 e TNS          TNSClient.cpp(00637) : nameserver hanaserver:30001 not responding. retry in 5 sec...

We changed the hostname back to resolve the issue. If it possible to change the hostname? It doesn't seem to make sense if we have multiple Hana instances and they all have the same hostname.

Thanks!