The Conditioned Hours for Users forms part of the working profile and hours these users can submit on Timesheets.
The hour values themselves are simply stored in a SQL table within the Database which then appear against the User when viewing in Financials.
No standard process should update the hours for a user. So if you have lost the values for these across multiple users, would it be possible you have a custom process or integration relating to Conditioned Hours or User records?
The only way to fix your query would be by updating the affected users with their correct conditioned hours.
