an error during backup - after upgrade to 16.:0

an error during backup - after upgrade to 16.:0

Hi.
After executing backup from scheduler I received email:
MessageDear Admin,
    Unable to take the backup of ServiceDesk Plus, So please contact your database Administrator [OR] 
    product support for further assistance to fix the below error and forward this E-Mail and support file(s) to servicedeskplus-support@manageengine.com
Error Message
    java.lang.Exception: FATAL: could not open shared memory segment "/PostgreSQL.2343546974": No such file or directory at com.adventnet.servicedesk.setup.task.ScheduledBackupTask.executeTask(ScheduledBackupTask.java:123) at com.adventnet.taskengine.internal.SchedulerBean.executeTask(SchedulerBean.java:698) at jdk.internal.reflect.GeneratedMethodAccessor89.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.base/java.lang.reflect.Method.invoke(Unknown Source) at com.adventnet.mfw.bean.BeanProxy.lambda$invoke$0(BeanProxy.java:51) at com.zoho.mickey.api.DefaultCodeBlock.execute(CodeBlock.java:682) at com.adventnet.mfw.bean.BeanProxy.invoke(BeanProxy.java:48) at jdk.proxy3/jdk.proxy3.$Proxy22.executeTask(Unknown Source) at com.adventnet.taskengine.internal.ScheduleExecutor.executeNextTask(ScheduleExecutor.java:334) at com.adventnet.taskengine.internal.ScheduleExecutor.run(ScheduleExecutor.java:225) at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) at java.base/java.util.concurrent.FutureTask.run(Unknown Source) at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.base/java.lang.Thread.run(Unknown Source)