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Preserve identity when changing a data model - Paper 2

Read the information, then answer the questions. An adult may read the instructions aloud. Show your working where asked.

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Invented records in tenant T: old lesson O6 and another lesson X6 share title 'Reading'. Submission S6 points to O6; attempt A6 also points to O6. Replacement N6 has new teaching, not proven equivalent. Policy: archive O6 from current navigation, retain historical links, and do not alter X6. No real migration is requested.

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