LightRAG v1.5.3 adds a one-time Milvus migration and hardens production edge cases

JeremyCMorgan · x · 2026-07-28

LightRAG’s v1.5.3 release notes read like a list of production scars:

• It calls out issues such as Lucene reserved characters, XML control characters, and LLM JSON getting mangled by LaTeX escapes.
• For existing Milvus deployments, upgrading now triggers a one-time automatic migration on the next initializestorages(): the legacy collection is copied into a new model-suffixed collection before the service becomes ready.
• The release warns that this can add startup time and temporarily reduce write throughput on large collections, but the migration only happens once.
• The old {workspace}{namespace} collection is kept for safety and not deleted automatically.

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