1. Download off of cydia and install AppAdmin
2. Downgrade your app to the outdated/old save game version
3. Update it with appadmin (downgrade again, but press and hold open and scroll to the top. Click the first one); Updating from appstore may ruin it.
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note: if your transfering it, use game center and open it while its downgraded.
If you cannot use game center, extract the ipa with iFunBox (since its simpler), then proceed with impactor.
this was kindof a noob tutorial but its useful.
**tested on ipad mini1 9.3.5 and transfered to 11.3.1 ipad pro. Worked with my iphone 6s.**
It also adds ban protection, because it knows you didnt install anything, and its gamecenter progress.