Failed to enable datasource ("generate more then one cf")

18:40:07,600 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-2) MSC00001: Failed to start service jboss.data-source.java:/H2DS: org.jboss.msc.service.StartException in service jboss.data-source.java:/H2DS: Error during the deployment of java:/H2DS
at org.jboss.as.connector.subsystems.datasources.AbstractDataSourceService.start(AbstractDataSourceService.java:113)
at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1675)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [:1.6.0_24]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [:1.6.0_24]
at java.lang.Thread.run(Thread.java:680) [:1.6.0_24]
Caused by: org.jboss.msc.service.StartException in anonymous service: unable to start the ds because it generate more than one cf
at org.jboss.as.connector.subsystems.datasources.AbstractDataSourceService.start(AbstractDataSourceService.java:108)
... 4 more

18:40:07,603 INFO [org.jboss.as.server] (MSC service thread 1-2) Service status report
Services which failed to start:
service jboss.data-source.java:/H2DS: org.jboss.msc.service.StartException in service jboss.data-source.java:/H2DS: Error during the deployment of java:/H2DS