Internal server error when disabling a Job on JBAC

java.lang.IllegalArgumentException: cannot save merged build definitions
	at com.google.common.base.Preconditions.checkArgument(Preconditions.java:88)
	at com.atlassian.bamboo.plan.PlanHibernateDao.save(PlanHibernateDao.java:428)
	at com.atlassian.bamboo.plan.PlanHibernateDao.save(PlanHibernateDao.java:45)
	at sun.reflect.GeneratedMethodAccessor1007.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:304)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
	at $Proxy39.save(Unknown Source)
	at com.atlassian.bamboo.plan.PlanManagerImpl.savePlan(PlanManagerImpl.java:297)
	at sun.reflect.GeneratedMethodAccessor1848.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:304)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
	at com.atlassian.bamboo.security.acegi.intercept.aopalliance.AuthorityOverrideMethodSecurityInterceptor.invoke(AuthorityOverrideMethodSecurityInterceptor.java:29)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
	at $Proxy42.savePlan(Unknown Source)
	at com.atlassian.bamboo.build.DefaultBuildDefinitionManager$1.run(DefaultBuildDefinitionManager.java:122)
	at com.atlassian.bamboo.schedule.PlanSchedulerCallback.run(PlanSchedulerCallback.java:24)
	at com.atlassian.bamboo.schedule.DefaultPlanScheduler$3.run(DefaultPlanScheduler.java:93)
	at com.atlassian.util.concurrent.ManagedLocks$ManagedLockImpl.withLock(ManagedLocks.java:333)
	at com.atlassian.bamboo.schedule.DefaultPlanScheduler.executeWithoutPlanSchedules(DefaultPlanScheduler.java:86)
	at com.atlassian.bamboo.build.DefaultBuildDefinitionManager.savePlanAndDefinition(DefaultBuildDefinitionManager.java:113)
	at sun.reflect.GeneratedMethodAccessor4997.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:304)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
	at $Proxy62.savePlanAndDefinition(Unknown Source)
	at com.atlassian.bamboo.plan.branch.JobPropagatingFacade.savePlanAndDefinition(JobPropagatingFacade.java:99)
	at com.atlassian.bamboo.ww2.actions.build.admin.config.ConfigureBuildDetails.doCreate(ConfigureBuildDetails.java:141)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)