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Domainunvalidated

Data Loss Detection

1fe4bfe8-6a0d-4fa1-b76a-0ddd1b37db8f

Data Loss Detection

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Updated7/14/2026

PageRank0.0000

Effectiveness0.000

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3 linked nodes

PERTAIN_TOSolution

Preserve properties explicitly. — Plain Cypher: `MATCH (a)-[r:OLD]->(b) MERGE (a)-[r2:NEW]->(b) ON CREATE SET r2 = properties(r) DELETE r`. Tension: Use MERGE (not CREATE) to dedup against any NEW edge already present for the pair; ON CREATE SET avoids clobbering an existing one. Outcome: Both forms are idempotent (a re-run matches no OLD edges).

PERTAIN_TOReport

Neo4j migration runner: dry-run mode via paired read-only count cyphers + MERGE-collision data-loss detection

PERTAIN_TOProblem

no dry run, no --apply guard, no printed target, no per-migration selection — A one-time Neo4j relationship-migration runner (migrate-rels.ts) executed every write cypher immediately on any invocation.

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