WD upgrade throws 'PropertyImplementationException' while running WorkflowDesignerUpgradeTask001 when connected to MySQL.

2012-11-16 11:32:29,583 http-bio-8090-exec-5 ERROR admin 692x110x1 8uu9st 127.0.0.1 /rest/testkit-test/1.0/dataImport [plugins.upgrade.tasks.WorkflowDesignerUpgradeTask001] An error occurred while trying to migrate the existing workflow layouts to the new md5sum based storage format.
com.opensymphony.module.propertyset.PropertyImplementationException: Property 'jira.jwd.layout:test workflow ' not found
	at com.opensymphony.module.propertyset.ofbiz.OFBizPropertySet.getType(OFBizPropertySet.java:162)
	at com.opensymphony.module.propertyset.ofbiz.OFBizPropertySet.remove(OFBizPropertySet.java:203)
	at com.atlassian.jira.plugins.upgrade.tasks.WorkflowDesignerUpgradeTask001$LegacyWorkflowLayoutPropertyKeyMigration.migrate(WorkflowDesignerUpgradeTask001.java:111)
	at com.atlassian.jira.plugins.upgrade.tasks.WorkflowDesignerUpgradeTask001$LegacyWorkflowLayoutPropertyKeyMigration.perform(WorkflowDesignerUpgradeTask001.java:84)
	at com.atlassian.jira.plugins.upgrade.tasks.WorkflowDesignerUpgradeTask001.doUpgrade(WorkflowDesignerUpgradeTask001.java:61)
	at sun.reflect.GeneratedMethodAccessor309.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)
	at org.springframework.osgi.service.importer.support.internal.aop.ServiceInvoker.doInvoke(ServiceInvoker.java:58)
	at org.springframework.osgi.service.importer.support.internal.aop.ServiceInvoker.invoke(ServiceInvoker.java:62)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
	at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invokeUnprivileged(ServiceTCCLInterceptor.java:56)
	at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invoke(ServiceTCCLInterceptor.java:39)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)