discord-reply | An discord.js extension to inline reply messages | Chat library

I'm fairly new when it comes to creating bots for Discord, and I wanted to add a feature for it to respond to pings. I'm using this command and event handler. After a few minutes of searching, I found a way to do it about here. I put it in the message.js file (this is the file created when making the event handler), seemingly everything works, but when I use a command, the number of ping response messages increases, that is:

• if immediately after starting the bot, I ping it, it will not respond
• if I use one command and ping him, he will answer once
• if I use two commands and ping him, he will answer twice

And so on

My question is: How to make bot always answer once?

This is my code: