Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
After a clarifying discussion I see that my downvote was not necessary.
Do I have to wait until the post is edited and then upvote or is there another possibility?
Unless you catch it within 5 minutes of making the vote, yes, you have to wait until the post is edited. If you see something that can be improved about the post, you can suggest an edit yourself.