Change Disc with different region will start the game all over again?

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I have "region 2" Shadow of Mordor and 64% accomplished, and since I live in Asia which is needed the same region to get the DLC I bought the "region 3" one, but it won't load the saved data from my previous game, it was 34 hours of gameplay, I'm so close to get it done.
Please help, how can i continue to play with my previous game progress?
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