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    java.lang.NullPointerException
        at com.atlassian.jira.web.action.issue.MoveSubTaskChooseOperation.doDefault(MoveSubTaskChooseOperation.java:51)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
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