Firebase Database Fix

My project is about fixing a Firebase database that is not saving data correctly. Recently, my client's data disappeared unexpectedly. I need a freelancer who has good knowledge of the Firebase database to help me with this issue. The desired outcome of this project is to fix a coding bug in order to make sure the data is saved correctly in the Firebase database. I also want to ensure proper security of the data and logging of changes. If you have experience dealing with Firebase projects, this would be the perfect opportunity for you! Please reach out if you feel like you could help me out with this issue.