Hi 
I am creating rails app with 
Rails version: 6.1.3
Ruby version: 3.0.0
mongoid: mongoid (7.3.0.alpha ff8fefa)

When I took gem 'mongoid', '~> 7.2'
gave me issue of 

Bundler could not find compatible versions for gem "activemodel":
In Gemfile:
mongoid (~> 7.2) x86_64-linux was resolved to 7.2.0, which depends on
activemodel (>= 5.1, < 6.1)

rails (~> 6.1.3) x86_64-linux was resolved to 6.1.3, which depends on
activemodel (= 6.1.3)

So I have to go for mongoid (7.3.0.alpha ff8fefa)

When I have added validations to my model

class Whatsapp
include Mongoid::Document
include Mongoid::Timestamps

field :mobile_number, type: String
field :message, type: String
field :api_response, type: String

validates :mobile_number, :message, :api_response, presence: true
end

3.0.0 :001 > w = Whatsapp.create!(mobile_number: "9898989898", message: "", api_response: "")
Traceback (most recent call last):
1: from (irb):1:in `<main>'
ArgumentError (wrong number of arguments (given 3, expected 1..2))

What is the issue?