Troubleshoot and resolve PHP code on my used car sales website to fix the UPDATE button which is not working when trying to change inventory details.

I moved our website from GoDaddy hosting to Bluehost. Website is HTML & PHP and contains two SQL databases. SQL DBs were moved by backing up at GoDaddy, creating new DBs at Bluehost and importing the GoDaddy SQL backups. Website transfer is completed fine, but on some of our used car listings, the UPDATE button will not work to save the changes we make to different details for that specific car / listing. The update button works fine on other listings. We can create new listings, but the UPDATE button doesn't work on some of our existing listings. So I need you to bid for this project to troubleshoot and fix the PHP coding on the site. You will be logging into a remote computer and using that environment to perform your troubleshooting and coding. I will be watching and will need you to send me an email with the reasons why it wasn't working and what you did to correct the problem. The website domain will be given to you once you are selected for the project.