FAQ: Playstation 3 + Gran Turismo 6 Update Stuck

The Problem

I recently wanted to resume playing GT6 on my PS3. Unfortunately I started updating first. This took forever. 21 updates were available but wouldn't install properly, so I go stuck in a loop (cancelling all updates wouldn't work).

The Workaround

1. Backupped my data
2. Deleted all Game Data
3. Went to Game Icon → Press Triangle → Check for update
4. Let 1-2GB of updates install, then press Circle to cancel further updates
5. Repeated from Step 3 until all updates are done