Freeze subtasks groovy script does not work on JIRA 8

[Normann P_ Nielsen _Netic_]

I have this Script:

subTasks.each {

  SubtaskKey = it.key
  SubtaskStatus = it.getStatus().getName()
  log.info "Script=" + scriptName + " IssueKey=" + IssueKey + " ScriptRunIdent=" + scriptRunIdent + " Action='Processing " + SubtaskKey + "' Status=" + SubtaskStatus

  if (SubtaskStatus == "Open")
  {
    //Set Freeze Date from Parent
    it.setCustomFieldValue(FrozenUntil,FrozenUntilValue)
    // Transist Issue
    workflowTransitionUtil.setIssue(it)
    workflowTransitionUtil.setAction (921)    // 921 = Freeze
    //validate and transition issue
    workflowTransitionUtil.validate()
    workflowTransitionUtil.progress()
  }

  if (SubtaskStatus == "In Progress")
  {
    //Set Freeze Date from Parent
    it.setCustomFieldValue(FrozenUntil,FrozenUntilValue)
    // Transist Issue
    workflowTransitionUtil.setIssue(it)
    workflowTransitionUtil.setAction (791)    // 791 = Freeze
    //validate and transition issue
    workflowTransitionUtil.validate()
    workflowTransitionUtil.progress()
  }
}

That worked fine on JIRA 7.x 

On JIRA 8 I get:

org.ofbiz.core.entity.GenericTransactionException: Commit failed, rollback previously requested by nested transaction.

In the logs:

2019-12-17 13:09:12,537 http-nio-6060-exec-86 ERROR npn 789x11830326x1 mece4z 77.243.59.220,77.243.49.62 /secure/CommentAssignIssue.jspa [c.a.jira.workflow.OSWorkflowManager] Caught exception while attempting to perform action 931 from workflow 471131 on issue 'NIS-65999'
com.atlassian.jira.transaction.TransactionRuntimeException: org.ofbiz.core.entity.GenericTransactionException: Commit failed, rollback previously requested by nested transaction.
at com.atlassian.jira.transaction.TransactionSupportImpl$TransactionImpl.commit(TransactionSupportImpl.java:91)
at com.atlassian.jira.workflow.OSWorkflowManager.doWorkflowActionInsideTxn(OSWorkflowManager.java:849)
at com.atlassian.jira.workflow.OSWorkflowManager.doWorkflowAction(OSWorkflowManager.java:799)
at com.atlassian.jira.bc.issue.DefaultIssueService.transition(DefaultIssueService.java:514)
at com.atlassian.jira.web.action.issue.CommentAssignIssue.doExecute(CommentAssignIssue.java:161)
... 1 filtered
at com.atlassian.jira.action.JiraActionSupport.execute(JiraActionSupport.java:63)
... 7 filtered
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
... 48 filtered
at com.atlassian.greenhopper.jira.filters.ClassicBoardRouter.doFilter(ClassicBoardRouter.java:62)
... 7 filtered
at com.atlassian.jira.plugin.mobile.web.filter.MobileAppRequestFilter.doFilter(MobileAppRequestFilter.java:37)
... 4 filtered
at com.atlassian.jira.plugin.mobile.login.MobileLoginSuccessFilter.doFilter(MobileLoginSuccessFilter.java:54)
... 3 filtered
at com.atlassian.diagnostics.internal.platform.monitor.http.HttpRequestMonitoringFilter.doFilter(HttpRequestMonitoringFilter.java:55)
... 8 filtered
at com.atlassian.web.servlet.plugin.request.RedirectInterceptingFilter.doFilter(RedirectInterceptingFilter.java:21)
... 51 filtered

For all Sub-task issues...

Do I need som store/reindex/commit stuff...