Doubled value when using annotate Sum,Count

Question

I am using this code and I get a result which is not what I expect

queryset= User.objects.annotate(earned_leave=Sum('logs__work_hours'))

Here is my data

"logs": 
        {
            "id": 96,
            "time_in": "11:43:34",
            "time_out": "21:25:49",
            "user": "admin",
            "date_created": "2022-10-21",
            "work_hours": 10,
            "last_action": "logout",
            "earned_credit": "0.38400"
        }

and here is the result

"earned_leave": 20

Tried this solution but I'm not comfortable with it

queryset= User.objects.annotate(earned_leave=Sum('logs__work_hours')/2)

I cannot use distinct=True since it won't count same values