I M Trying To Delete Something From Database But My Work Is Not Working

Can someone help me I’ve been trying to fix this for many hours now. I’m trying to delete something from database but my work is not working.

I changed my username and password to “-” so i dont share my account.

Here’s what my page look like right now:

Admin.php

          

 

 Id

 Category Name

 Delete

 

 

 

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