There are two versions of the Definitive Edition games that have an effect on the save files.
1.0x
1.0x is any version of the game before the November 12, 2024 update. 1.0x games cannot load 1.1x save files.
1.1x
1.1x is any version of the game on or after the November 12, 2024 1.112 update. This update made major changes to the save files. 1.1x games can load 1.0x save files, but will save them as 1.1x save files.
