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Type:
Task
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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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Catalog and Routing
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Fully Compatible
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CAR Team 2025-08-04, CAR Team 2025-08-18, CAR Team 2025-09-01
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🟩 Routing and Topology
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None
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We need to add a new permitted transition in the FCVTransitions class in order to allow downgrading back to the original FCV in case an upgrade fails due to incompatible features. More specifically, we need to allow transition isUpgrading -> isDowngrading -> isDowngraded.
- is duplicated by
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SERVER-103518 Add support to a feasibility phase on setFCV upgrade
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- Closed
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- related to
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SERVER-109008 Support "upgrading to downgrading" transition for 8.2 to 9.0 upgrade
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- Open
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SERVER-109377 Investigate why topologyVersion gets incremented differently on upgrading and downgrading
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- In Code Review
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