Auto merge branch plan fail with error - Name is null

2017-02-20 21:04:40,679 INFO [5-DelayedChangeDetectionThread:pool-11-thread-4] [ChainExecutionManagerImpl] Doing the merge before the first stage
2017-02-20 21:04:40,680 INFO [5-DelayedChangeDetectionThread:pool-11-thread-4] [BranchIntegrationHelperImpl] Checking out code from BAM-BIT, revision cf7acae1a4b5b212a4d92ac3c4b5d910a82865b2
2017-02-20 21:04:40,680 INFO [5-DelayedChangeDetectionThread:pool-11-thread-4] [BranchIntegrationHelperImpl] and merging code from BAM-BIT1, revision e30cbf5b851669aa0513386290a5b0819cb3921b
2017-02-20 21:04:40,680 WARN [5-DelayedChangeDetectionThread:pool-11-thread-4] [ChainExecutionManagerImpl] Exception during merge: Name is null
java.lang.NullPointerException: Name is null
	at java.lang.Enum.valueOf(Enum.java:236)
	at com.atlassian.bamboo.plugins.bitbucket.api.BitbucketRepositoryType.valueOf(BitbucketRepositoryType.java:6)
	at com.atlassian.bamboo.plugins.bitbucket.v2.AbstractBitbucketCloudExecutor.getRepositoryType(AbstractBitbucketCloudExecutor.java:73)
	at com.atlassian.bamboo.plugins.bitbucket.v2.AbstractBitbucketCloudExecutor.getUnderlyingVcsModuleDescriptor(AbstractBitbucketCloudExecutor.java:258)
	at com.atlassian.bamboo.plugins.bitbucket.v2.BitbucketCloudWorkingCopyManager.getWorkingCopyManager(BitbucketCloudWorkingCopyManager.java:115)
	at com.atlassian.bamboo.plugins.bitbucket.v2.BitbucketCloudWorkingCopyManager.checkoutAndMerge(BitbucketCloudWorkingCopyManager.java:93)
	at com.atlassian.bamboo.plugins.bitbucket.v2.BitbucketCloudWorkingCopyManager.checkoutAndMerge(BitbucketCloudWorkingCopyManager.java:94)
	at com.atlassian.bamboo.plan.branch.BranchIntegrationHelperImpl.merge(BranchIntegrationHelperImpl.java:257)
	at com.atlassian.bamboo.chains.ChainExecutionManagerImpl.lambda$doVcsMergeRunnable$4(ChainExecutionManagerImpl.java:1148)
	at com.atlassian.bamboo.variable.CustomVariableContextImpl.withVariableSubstitutor(CustomVariableContextImpl.java:206)
	at com.atlassian.bamboo.chains.ChainExecutionManagerImpl.doVcsMerge(ChainExecutionManagerImpl.java:1091)
	at com.atlassian.bamboo.chains.ChainExecutionManagerImpl.access$1600(ChainExecutionManagerImpl.java:126)
	at com.atlassian.bamboo.chains.ChainExecutionManagerImpl$4.run(ChainExecutionManagerImpl.java:718)
	at io.atlassian.util.concurrent.ManagedLocks$ManagedLockImpl.withLock(ManagedLocks.java:302)
	at com.atlassian.bamboo.chains.ChainExecutionManagerImpl.execute(ChainExecutionManagerImpl.java:701)
	at com.atlassian.bamboo.chains.ChainExecutionManagerImpl.tryStartChainState(ChainExecutionManagerImpl.java:367)
	at com.atlassian.bamboo.chains.ChainExecutionManagerImpl.delayedStart(ChainExecutionManagerImpl.java:235)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:302)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208)
	at com.sun.proxy.$Proxy152.delayedStart(Unknown Source)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:302)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
	at com.sun.proxy.$Proxy152.delayedStart(Unknown Source)
	at com.atlassian.bamboo.plan.PlanExecutionManagerImpl$1$1$1.lambda$call$0(PlanExecutionManagerImpl.java:413)
	at com.atlassian.bamboo.util.CacheAwareness$3.call(CacheAwareness.java:159)
	at com.atlassian.bamboo.util.CacheAwareness$3.call(CacheAwareness.java:155)
	at com.atlassian.bamboo.util.CacheAwareness.withValuesOlderThanTimestampReloaded(CacheAwareness.java:188)
	at com.atlassian.bamboo.util.CacheAwareness.withValuesOlderThanTimestampReloaded(CacheAwareness.java:154)
	at com.atlassian.bamboo.util.CacheAwareness.withValuesOlderThanTimestampReloaded(CacheAwareness.java:219)
	at com.atlassian.bamboo.plan.PlanExecutionManagerImpl$1$1$1.call(PlanExecutionManagerImpl.java:412)
	at com.atlassian.bamboo.plan.PlanExecutionManagerImpl$1$1$1.call(PlanExecutionManagerImpl.java:403)
	at io.atlassian.util.concurrent.ManagedLocks$ManagedLockImpl.withLock(ManagedLocks.java:293)
	at com.atlassian.bamboo.plan.PlanExecutionLockServiceImpl.lock(PlanExecutionLockServiceImpl.java:85)
	at com.atlassian.bamboo.plan.PlanExecutionManagerImpl.doWithProcessLock(PlanExecutionManagerImpl.java:783)
	at com.atlassian.bamboo.plan.PlanExecutionManagerImpl.access$400(PlanExecutionManagerImpl.java:130)
	at com.atlassian.bamboo.plan.PlanExecutionManagerImpl$1$1.run(PlanExecutionManagerImpl.java:397)
	at com.atlassian.bamboo.utils.BambooRunnables$1.run(BambooRunnables.java:51)
	at com.atlassian.bamboo.security.ImpersonationHelper.runWith(ImpersonationHelper.java:31)
	at com.atlassian.bamboo.security.ImpersonationHelper.runWithSystemAuthority(ImpersonationHelper.java:20)
	at com.atlassian.bamboo.security.ImpersonationHelper$1.run(ImpersonationHelper.java:52)
	at java.lang.Thread.run(Thread.java:745)