Interpret and fix PHP code before Sat 6th June (then monitor for next two weekends)

General information for the website: Online rugby manager game
Kind of development: Customization of existing website
Description of requirements/features: PHP, SQL, Cron Jobs
Extra notes: I built an online rugby manager game for my client in raw PHP (no frameworks) which launched in September last year.

The first 'season' endings have just happened and some elements of the database in the affected games are now wrong, making some aspects of the gameplay impossible. Up to this point, everything was running smoothly, and the 'season reset' code was previously tested but only on a small scale, with a handful of active games.

I have since changed jobs so no longer have the time to identify and fix the errors. This job needs to be done by Saturday lunchtime (UK time), and then the system will require checking over the next two weekends (cron jobs happen on Saturday at 3pm and Sunday at 3am) to ensure fixes have been applied correctly for other games which are approaching their 'season' end dates.

There will likely be more work in the future on this site direct from my client, for ongoing changes and improvements which I no longer have time to complete.

The job will be awarded by Tuesday evening (UK time) and all FTP and admin area (custom-coded) details will be passed to the winning bidder at that stage. I will then be available on Skype, telephone and email to answer any queries as you inspect and fix the code. Please, no enquiries except through PPH to ensure fairness.

UK and Europe bidders only due to the tight turnaround and matching working hours where I can be available to answer questions.