InvalidClassException when aborting process instances in BPM Suite Intelligent Process Server

Issue

• I was attempting to remove old containers from our dev environment, which required me to remove some running instances. Using the delete method : http://HOSTNAME/kie-server/services/rest/server/containers/CONTAINER/processes/instances/INSTANCE, I am getting an error complaining about a class definition :

2017-07-14 13:05:32,677 WARN  [org.drools.persistence.SingleSessionCommandService] (default task-20) Could not commit session: java.lang.IllegalArgumentException: IOException while loading process instance: com.example.MyPojo; local class incompatible: stream classdesc serialVersionUID = 1542319415074975963, local class serialVersionUID = -4964948377236007170
        at org.jbpm.persistence.processinstance.ProcessInstanceInfo.getProcessInstance(ProcessInstanceInfo.java:193)
        at org.jbpm.persistence.processinstance.ProcessInstanceInfo.getProcessInstance(ProcessInstanceInfo.java:166)
        at org.jbpm.persistence.processinstance.JPAProcessInstanceManager.getProcessInstance(JPAProcessInstanceManager.java:140)
        at org.jbpm.process.instance.ProcessRuntimeImpl.getProcessInstance(ProcessRuntimeImpl.java:283)
        at org.jbpm.process.instance.ProcessRuntimeImpl.getProcessInstance(ProcessRuntimeImpl.java:279)
        at org.jbpm.process.instance.ProcessRuntimeImpl.abortProcessInstance(ProcessRuntimeImpl.java:470)
        at org.drools.core.impl.StatefulKnowledgeSessionImpl.abortProcessInstance(StatefulKnowledgeSessionImpl.java:550)
        at org.drools.core.command.runtime.process.AbortProcessInstanceCommand.execute(AbortProcessInstanceCommand.java:55)
        at org.drools.core.command.runtime.process.AbortProcessInstanceCommand.execute(AbortProcessInstanceCommand.java:30)
        at org.drools.core.command.impl.DefaultCommandService.execute(DefaultCommandService.java:36)
        at org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:41)
        at org.drools.persistence.SingleSessionCommandService$TransactionInterceptor.execute(SingleSessionCommandService.java:604)
        at org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:41)
        at org.drools.persistence.jpa.OptimisticLockRetryInterceptor.execute(OptimisticLockRetryInterceptor.java:82)
        at org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:41)
        at org.drools.persistence.jta.TransactionLockInterceptor.execute(TransactionLockInterceptor.java:73)
        at org.drools.persistence.SingleSessionCommandService.execute(SingleSessionCommandService.java:397)
        at org.drools.core.command.impl.CommandBasedStatefulKnowledgeSession.abortProcessInstance(CommandBasedStatefulKnowledgeSession.java:147)
        at org.jbpm.kie.services.impl.ProcessServiceImpl.abortProcessInstance(ProcessServiceImpl.java:147)
        at org.kie.server.services.jbpm.ProcessServiceBase.abortProcessInstance(ProcessServiceBase.java:118)
        at org.kie.server.remote.rest.jbpm.ProcessResource.abortProcessInstance(ProcessResource.java:135)
        ...
Caused by: java.io.InvalidClassException: com.example.MyPojo; local class incompatible: stream classdesc serialVersionUID = 1542319415074975963, local class serialVersionUID = -4964948377236007170
        at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:616)
        at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1829)
        at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1713)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1986)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1535)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:422)
        at java.util.ArrayList.readObject(ArrayList.java:791)
        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:498)
        at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:1058)
        at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:2122)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2013)
        at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1535)
        at java.io.ObjectInputStream.readObject(ObjectInputStream.java:422)
        at org.drools.core.marshalling.impl.SerializablePlaceholderResolverStrategy$SerializablePlaceholderStrategyContext.read(SerializablePlaceholderResolverStrategy.java:93)
        at org.drools.core.marshalling.impl.PersisterHelper.loadStrategiesIndex(PersisterHelper.java:327)
        at org.drools.core.marshalling.impl.PersisterHelper.loadStrategiesCheckSignature(PersisterHelper.java:273)
        at org.drools.core.marshalling.impl.PersisterHelper.readFromStreamWithHeaderPreloaded(PersisterHelper.java:289)
        at org.jbpm.marshalling.impl.AbstractProtobufProcessInstanceMarshaller.readProcessInstance(AbstractProtobufProcessInstanceMarshaller.java:476)
        at org.jbpm.persistence.processinstance.ProcessInstanceInfo.getProcessInstance(ProcessInstanceInfo.java:185)
        ... 64 more