Is it legal to sell art made with Midjourney?

Is it truly legal to sell artwork created using the Midjourney AI tool? I've heard conflicting opinions on whether or not it violates any copyright laws or ethical boundaries. As a creator, I want to ensure that my work is not only unique but also complies with all relevant regulations. Could you please clarify the legal standing of selling art generated by Midjourney, and provide any guidance on how to navigate potential legal issues in this area?