Why can't the user list the sold token again ?

[haariskhatri]

Hello @Markkop , Thanks for the code , I'm a beginner and it was really helpful to me as a reference . However , once you buy a token through the market place , you cannot sell it again . It shows that you're not the owner even though the owner is updated in the NFT contract . I'm unable to get why that is happening . I would be kind of you to explain.