Elon Musk tweeted a photo on Monday night that shows him logged into his Twitter account, advertising to content creators how they can activate monetization features on Twitter. Unfortunately for Musk, people weren’t paying much attention to the fact that he has 24.7K paid subscribers — instead, some users realized that he appeared to be logged into another account. And upon deeper investigation, it looked like the account belonged to @ErmnMusk, a now-deleted account with the display name “Elon Test,” which used a photo of Musk’s three-year-old son as its avatar.