I had posted an answer for a user where he was not able to add products in quote programmatically. The solution worked for him and he accepted the answer.
After few days he got a new problem and instead of posting a new question the user unaccepted the answer and posted the new issue in the comment.
Should there be time limit set for accepting an answer?
My question is not for time limit for accepting an answer. The OP had accepted the answer later after few days about 5 days after accepting an answer he faced a new problem so he commented in my answer about his new query and unaccepted the answer.