Trying to delte Worklog Type. After clicking on "Delete Worklog Type" and confirming that Worklog type is not used ("Yes" button), the worklog type is not deleted and now error shown on screen.

Log displays NullPointerException:

2019-03-25 12:22:28,675 http-bio-443-exec-1682 ERROR btb_test 742x915746x2 rxdsue 10.79.252.61 /rest/minyaaTM/1.0/worklogType/10200/mergeAndRemove [c.a.p.r.c.error.jersey.ThrowableExceptionMapper] Uncaught exception thrown by REST service: null
java.lang.NullPointerException
at fr.alkaes.myaatm.rest.worklogtype.WorklogTypeResource.mergeAndRemoveWorklogType(WorklogTypeResource.java:208)
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)
... 19 filtered
at com.atlassian.plugins.rest.module.RestDelegatingServletFilter$JerseyOsgiServletContainer.doFilter(RestDelegatingServletFilter.java:154)
... 1 filtered
at com.atlassian.plugins.rest.module.RestDelegatingServletFilter.doFilter(RestDelegatingServletFilter.java:68)
... 36 filtered
at com.atlassian.web.servlet.plugin.request.RedirectInterceptingFilter.doFilter(RedirectInterceptingFilter.java:21)
... 46 filtered
at com.quisapps.jira.fieldsecurity.filter.FieldSecurityFilter.doFilterChainWithProfiling(FieldSecurityFilter.java:251)
at com.quisapps.jira.fieldsecurity.filter.FieldSecurityFilter.doFilterInterval(FieldSecurityFilter.java:106)
at com.quisapps.jira.fieldsecurity.filter.FieldSecurityFilter.doFilter(FieldSecurityFilter.java:63)
... 10 filtered
at com.atlassian.jira.security.JiraSecurityFilter.lambda$doFilter$0(JiraSecurityFilter.java:76)
... 1 filtered
at com.atlassian.jira.security.JiraSecurityFilter.doFilter(JiraSecurityFilter.java:74)
... 16 filtered
at com.atlassian.plugins.rest.module.servlet.RestSeraphFilter.doFilter(RestSeraphFilter.java:37)
... 20 filtered
at com.atlassian.jira.servermetrics.CorrelationIdPopulatorFilter.doFilter(CorrelationIdPopulatorFilter.java:30)
... 10 filtered
at com.atlassian.web.servlet.plugin.request.RedirectInterceptingFilter.doFilter(RedirectInterceptingFilter.java:21)
... 4 filtered
at com.atlassian.web.servlet.plugin.LocationCleanerFilter.doFilter(LocationCleanerFilter.java:36)
... 29 filtered
at com.atlassian.jira.servermetrics.MetricsCollectorFilter.doFilter(MetricsCollectorFilter.java:25)
... 27 filtered
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)