Here is some log output to help track this down (from engine.log):
2014-08-14 10:28:35,528 WARN
[org.ovirt.engine.core.dal.job.ExecutionMessageDirector]
(ajp--127.0.0.1-8702-22) [399284fd] The message key UpdateVmTemplate is
missing from bundles/ExecutionMessages
2014-08-14 10:28:35,554 WARN
[org.ovirt.engine.core.bll.UpdateVmTemplateCommand]
(ajp--127.0.0.1-8702-22) [399284fd] CanDoAction of action
UpdateVmTemplate failed. Reasons:VAR__ACTION__UPDATE,VAR__TYPE__VM_TEMP
LATE,ACTION_TYPE_FAILED_NAME_ALREADY_USED
2014-08-14 10:28:35,568 ERROR
[org.ovirt.engine.api.restapi.resource.AbstractBackendResource]
(ajp--127.0.0.1-8702-22) Operation Failed: [Cannot edit Template. The
Template name is already in use, please choose
a unique name and try again.]
--
Mit freundlichen Grüßen / Regards
Sven Kieske
Systemadministrator
Mittwald CM Service GmbH & Co. KG
Königsberger Straße 6
32339 Espelkamp
T: +49-5772-293-100
F: +49-5772-293-333
https://www.mittwald.de
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Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen