Negative Values in Call Tree

[gggopi]

For few requests, the self time values are in negative. And total time is a very large number.

http.url : /challenges/buddy-board

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Selftime (ms) Total (ms) Method signature

-00000.02 -00% ░░░░░░░░░░ 28265427543.28 100% ██████████ Get Buddy Board
-00000.39 -00% ░░░░░░░░░░ 28265427543.30 100% ██████████ └── void org.springframework.web.servlet.FrameworkServlet.service(HttpServletRequest,HttpServletResponse)
-00000.26 -00% ░░░░░░░░░░ 28265427543.69 100% ██████████ └── ResponseEntity com.evive.challenges.controller.BuddyController.getBuddyBoard(User)
-00028.38 -00% ░░░░░░░░░░ 28265427543.95 100% ██████████ └── UserAndBuddyDetails com.evive.challenges.service.BuddyStatusService.setBuddyStatusDetails(String,String)
-00000.25 -00% ░░░░░░░░░░ 28265427572.33 100% ██████████ └── void com.evive.challenges.service.BuddyStatusService.insertActiveChallengesHistory(String,String,List)
28265427572.58 100% ██████████ 28265427572.58 100% ██████████ └── void com.evive.service.HistoryTask.insertAsync(List)

Actual duration from the same ES document.
duration_cpu_ms 6.233
duration_ms 1,067.045

This does not make sense. Could you please look into it?
Thanks