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AI-generatedRen'Py Schema Changes: fix_rollback() vs Disabling Rollback for Save Compatibility
After a schema change in a Ren'Py project—such as adding a default field to an object stored in the game state—rollback can restore objects that lack the new field. The goal is to prevent rollback from producing an AttributeError while keeping existing saves loadable. Two documented approaches are available: call renpy.fix_rollback() at the schema boundary,
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