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Preserve identity when changing a data model - Paper 1

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 O5 and another lesson X5 share title 'Reading'. Submission S5 points to O5; attempt A5 also points to O5. Replacement N5 has new teaching, not proven equivalent. Policy: archive O5 from current navigation, retain historical links, and do not alter X5. No real migration is requested.

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