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Type:
Bug
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Resolution: Fixed
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Priority:
Major - P3
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Affects Version/s: None
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Component/s: None
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None
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Catalog and Routing
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Fully Compatible
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ALL
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CAR Team 2026-07-06
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200
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🟥 DDL
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None
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On FCV downgrade the `fixedBucketing` field is stripped from the catalog, and on upgrades it is re-added as `false`. So, in FCV upgrade/downgrade suites, re-creating a collection using a stale `listCollections` snapshot can fail with a NamespaceExists options mismatch.
Strip `fixedBucketing` from options in FCV upgrade/downgrade suites to keep the roundtrip invariant consistent.
- related to
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SERVER-130205 Investigate and fix disagg_multiversion failures in fixed_bucketing_fcv_tolerant.js
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- Closed
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