Repeated deletion to add the same network to the vm error #5651

NIC

4.15.0.0
4.15.2.0
4.16.0.0

1. add network1 to vm1
2. delete network1 form vm1
3. add network1 to vm1

Added network1 to the VM successfully

Failed
Adding network failed
Unable to schedule async job for command com.cloud.vm.VmWorkAddVmToNetwork, unexpected exception.


management.log
2021-11-02 11:09:45,740 WARN  [o.a.c.f.j.i.AsyncJobManagerImpl] (API-Job-Executor-98:ctx-e494c47e job-68640 ctx-e25ca7d3) (logid:b2e679eb) Unable to schedule async job for command com.cloud.vm.VmWorkAddVmToNetwork, unexpected exception.
javax.persistence.EntityExistsException: Entity already exists 
	at com.cloud.utils.db.GenericDaoBase.handleEntityExistsException(GenericDaoBase.java:858)
	at com.cloud.utils.db.GenericDaoBase.persist(GenericDaoBase.java:1449)
	at org.apache.cloudstack.framework.jobs.impl.AsyncJobManagerImpl$1.doInTransaction(AsyncJobManagerImpl.java:241)
	at org.apache.cloudstack.framework.jobs.impl.AsyncJobManagerImpl$1.doInTransaction(AsyncJobManagerImpl.java:237)
	at com.cloud.utils.db.Transaction$2.doInTransaction(Transaction.java:50)
	at com.cloud.utils.db.Transaction.execute(Transaction.java:40)
	at com.cloud.utils.db.Transaction.execute(Transaction.java:47)
	at org.apache.cloudstack.framework.jobs.impl.AsyncJobManagerImpl.submitAsyncJob(AsyncJobManagerImpl.java:237)
	at com.cloud.vm.VirtualMachineManagerImpl.createVmWorkJobToAddNetwork(VirtualMachineManagerImpl.java:5414)
	at com.cloud.vm.VirtualMachineManagerImpl.addVmToNetworkThroughJobQueue(VirtualMachineManagerImpl.java:5381)
	at com.cloud.vm.VirtualMachineManagerImpl.addVmToNetwork(VirtualMachineManagerImpl.java:3767)
	at com.cloud.vm.UserVmManagerImpl.addNicToVirtualMachine(UserVmManagerImpl.java:1427)
	at jdk.internal.reflect.GeneratedMethodAccessor1836.invoke(Unknown Source)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
	at org.apache.cloudstack.network.contrail.management.EventUtils$EventInterceptor.invoke(EventUtils.java:107)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175)
	at com.cloud.event.ActionEventInterceptor.invoke(ActionEventInterceptor.java:51)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175)
	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215)
	at com.sun.proxy.$Proxy183.addNicToVirtualMachine(Unknown Source)
	at org.apache.cloudstack.api.command.user.vm.AddNicToVMCmd.execute(AddNicToVMCmd.java:163)
	at com.cloud.api.ApiDispatcher.dispatch(ApiDispatcher.java:156)
	at com.cloud.api.ApiAsyncJobDispatcher.runJob(ApiAsyncJobDispatcher.java:108)
	at org.apache.cloudstack.framework.jobs.impl.AsyncJobManagerImpl$5.runInContext(AsyncJobManagerImpl.java:620)
	at org.apache.cloudstack.managed.context.ManagedContextRunnable$1.run(ManagedContextRunnable.java:48)
	at org.apache.cloudstack.managed.context.impl.DefaultManagedContext$1.call(DefaultManagedContext.java:55)
	at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.callWithContext(DefaultManagedContext.java:102)
	at org.apache.cloudstack.managed.context.impl.DefaultManagedContext.runWithContext(DefaultManagedContext.java:52)
	at org.apache.cloudstack.managed.context.ManagedContextRunnable.run(ManagedContextRunnable.java:45)
	at org.apache.cloudstack.framework.jobs.impl.AsyncJobManagerImpl$5.run(AsyncJobManagerImpl.java:568)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: java.sql.SQLIntegrityConstraintViolationException: Duplicate entry 'Filed-394-5f2f00fe-057b-4f93-b713-6b865893b2c0' for key 'vm_work_job_step_and_objects'