Circular Dependency Error for deleteMany MongoDB - node.js

Question

I am writing the Model for my Web App API, and am getting the following circular dependency error:
Warning: Accessing non-existent property 'deleteMany' of module exports inside circular dependency
(Use node --trace-warnings ... to show where the warning was created)
.
Here is my code:
const validator = require('validator')
const bcrypt = require('bcrypt')
const jwt = require('jsonwebtoken')
const Task = require('./task')
const mongoose = require('mongoose')
const Schema = mongoose.Schema
const userSchema = new Schema({
email: {
type: String,
unique: true,
required: true,
trim: true,
lowercase: true,
validate(value) {
if (!validator.isEmail(value)) {
throw new Error('Email is invalid.')
}
}
},
password: {
type: String,
required: true,
trim: true,
minLength: 8
},
name: {
type: String,
unique: true,
required: true,
trim: true
},
tokens: [{
token: {
type: String,
required: true
}
}]
})
userSchema.pre('save', async function(next) {
const user = this
if (user.isModified('password')) {
user.password = await bcrypt.hash(user.password, 8)
}
next() // run the save() method
})
userSchema.pre('deleteOne', {document: true, query: false}, async function(next) {
const user = this
await Task.deleteMany({owner: user._id})
next()
})
userSchema.methods.toJSON = function() {
const user = this
const userObject = user.toObject()
delete userObject.password
delete userObject.__v
delete userObject.tokens
return userObject
}
userSchema.methods.generateAuthToken = async function () {
const user = this
const token = jwt.sign({ _id: user._id.toString() }, process.env.JSON_WEB_TOKEN_SECRET)
user.tokens = user.tokens.concat({ token })
await user.save()
return token
}
userSchema.statics.findByCredentials = async (email, password) => {
const user = await User.findOne({email})
if (!user) {
throw new Error('Unable to login')
}
const isMatch = await bcrypt.compare(password, user.password)
if (!isMatch) {
throw new Error('Unable to login')
}
return user
}
userSchema.virtual('tasks', {
localField: '_id',
foreignField: 'owner',
ref: 'Task'
})
const User = mongoose.model('User', userSchema);
module.exports = User
Any idea what could be going wrong? I have checked my Node.js and MongoDB versions and updated them, but continue to get this same error when I try to delete. I can provide further details of my code if necessary. The problem area in question is the one leading with userScheme.pre('deleteOne'....