JDBCStartCommand fails with index already exists:

10:41:07,585 ERROR [AbstractKernelController] Error installing to Start:
name=jboss.j2ee:module="pgcon-server.jar",service=EjbModule state=Create
mode=Manual requiredState=Installed
org.jboss.deployment.DeploymentException: Error while creating table
at
org.jboss.ejb.plugins.cmp.jdbc.JDBCStartCommand.createIndex(JDBCStartCommand.java:692)
at
org.jboss.ejb.plugins.cmp.jdbc.JDBCStartCommand.createFKIndex(JDBCStartCommand.java:962)
at
org.jboss.ejb.plugins.cmp.jdbc.JDBCStartCommand.createCMRIndex(JDBCStartCommand.java:948)
at
org.jboss.ejb.plugins.cmp.jdbc.JDBCStartCommand.addForeignKeyConstraints(JDBCStartCommand.java:359)
at
org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.start(JDBCStoreManager.java:403)
at
org.jboss.ejb.plugins.CMPPersistenceManager.start(CMPPersistenceManager.java:172)
at org.jboss.ejb.EjbModule.startService(EjbModule.java:479)
at