GraphQL : Auto renew is creating duplicates - mongodb

Question

I have created a MERN employee management system where employers can assign task to employees have it able to change status(pending, overdue and submitted). And created recurring tasks which renew everyday automatically
So the idea is to create a resolver, which finds all Tasks. Once all tasks are found, it needs to check if any are over due and set the status of the task to overdue and the look for recurring Tasks
Recurring tasks are to renew automatically when the due date of the task has reached
I was Successful in achieving this but now for some reason the tasks are duplicating
i.e., if there is task
Expected
"send sales report" due on 24th mar 2022
so when it renews for the next day it should be
"send sales report" due on 25th mar 2022
But it duplicates
Current
"send sales report" due on 24th mar 2022
so when it renews for the next day it is
"send sales report" due on 25th mar 2022
"send sales report" due on 25th mar 2022
Sometimes it is creating duplicates, sometime it is creating triplets and some times quadruples
Attaching resolver below.
tasks : async () => {
const today = new Date()
const todayunix = Date.parse(today)
const allTasks = await Task.find({}).populate('user').sort({ status: 1 });
const recuurringTask = allTasks.filter((task)=> task.recurring === true)
const checkStatus = allTasks.filter((task) => task.status === 'pending')
if (today.getDay() !== 1) {
for (let i = 0; i < checkStatus.length; i++){
if(checkStatus[i].dueDate < todayunix){
const overdue = await Task.findByIdAndUpdate({_id : checkStatus[i]._id},{status:'overdue'})
}
}
for(let i = 0; i < recuurringTask.length; i++){
const fDueDate= new Date(recuurringTask[i].dueDate)
const fDueDateUnix = Date.parse(fDueDate)
if(fDueDateUnix < todayunix) {
const dueInDays = 86400000 * recuurringTask[i].renewIn
const calcDueDate = dueInDays + todayunix
const task = {
description: recuurringTask[i].description,
user: recuurringTask[i].user,
dueDate: new Date(calcDueDate),
recurring: recuurringTask[i].recurring,
renewIn:recuurringTask[i].renewIn
};
const createTask = await Task.create(task)
const setRecurringFalse = await Task.findOneAndUpdate({_id:recuurringTask[i]._id},{recurring:false})
}
}
}
return allTasks
},