Prune old versions terminates if a new version is created while the script is running

org.springframework.orm.hibernate.HibernateOptimisticLockingFailureException: Object of class [java.lang.Object] with identifier [null]: optimistic locking failed; nested exception is net.sf.hibernate.StaleObjectStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1 at org.springframework.orm.hibernate.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:593)
 at org.springframework.orm.hibernate.HibernateTransactionManager.convertHibernateAccessException(HibernateTransactionManager.java:607)
 at org.springframework.orm.hibernate.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:518)
 at com.atlassian.confluence.impl.hibernate.ConfluenceHibernateTransactionManager.doCommit(ConfluenceHibernateTransactionManager.java:69)
 at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:761)
 at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:730) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:302)
 at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
 at com.sun.proxy.$Proxy53.commit(Unknown Source)
 at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:485) 
 at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:291)
 at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
 at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208) 
 at com.sun.proxy.$Proxy2544.execute(Unknown Source) 
 at com.atlassian.confluence.core.service.ServiceCommand$execute.call(Unknown Source) 
 at com.onresolve.scriptrunner.canned.confluence.jobs.PruneOldPageVersions$_doScript_closure3$_closure4$_closure6.doCall(PruneOldPageVersions.groovy:133) 
 at com.onresolve.scriptrunner.canned.confluence.jobs.PruneOldPageVersions$_doScript_closure3$_closure4.doCall(PruneOldPageVersions.groovy:128) 
 at com.onresolve.scriptrunner.canned.confluence.jobs.PruneOldPageVersions$_doScript_closure3.doCall(PruneOldPageVersions.groovy:110) 
 at com.onresolve.scriptrunner.canned.confluence.jobs.PruneOldPageVersions$_doScript_closure3.doCall(PruneOldPageVersions.groovy) 
 at com.onresolve.scriptrunner.jobs.AbstractConfluenceCustomScheduledJob$_switchIndentityAndExecute_closure1.doCall(AbstractConfluenceCustomScheduledJob.groovy:29) 
 at com.onresolve.scriptrunner.jobs.AbstractConfluenceCustomScheduledJob$_switchIndentityAndExecute_closure1.doCall(AbstractConfluenceCustomScheduledJob.groovy) 
 at com.atlassian.confluence.user.AuthenticatedUserImpersonator$2.call(AuthenticatedUserImpersonator.java:118) 
 at com.atlassian.confluence.user.AuthenticatedUserImpersonator$1.call(AuthenticatedUserImpersonator.java:101) 
 at com.atlassian.confluence.user.AuthenticatedUserImpersonator.asUser(AuthenticatedUserImpersonator.java:82) 
 at com.atlassian.confluence.user.AuthenticatedUserImpersonator$asUser.call(Unknown Source) 
 at com.onresolve.scriptrunner.jobs.AbstractConfluenceCustomScheduledJob.switchIndentityAndExecute(AbstractConfluenceCustomScheduledJob.groovy:28) 
 at com.onresolve.scriptrunner.jobs.AbstractConfluenceCustomScheduledJob$switchIndentityAndExecute.callCurrent(Unknown Source) 
 at com.onresolve.scriptrunner.canned.confluence.jobs.PruneOldPageVersions.doScript(PruneOldPageVersions.groovy:100) 
Caused by: net.sf.hibernate.StaleObjectStateException: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1 at org.hibernate.internal.ExceptionConverterImpl.wrapStaleStateException(ExceptionConverterImpl.java:212) at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:86) at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:155) at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:162)
 at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1411)
 at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:475)
 at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:3168)
 at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2382)
 at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:467) at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:146)
 at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$100(JdbcResourceLocalTransactionCoordinatorImpl.java:38) at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:220)
 at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:68)
 at com.atlassian.hibernate.adapter.adapters.TransactionV2Adapter.commit(TransactionV2Adapter.java:30)
 at org.springframework.orm.hibernate.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:510)
  ... 26 more