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APPX_E_DELTA_BASELINE_VERSION_MISMATCH
APPX_E_DELTA_BASELINE_VERSION_MISMATCH means that a delta package was built for a different baseline version than the installed package selected for update. Delta servicing is version-specific.
What to verify
- Compare the baseline package identity and version recorded by the delta workflow with the installed package.
- Ensure that update distribution does not offer a delta built for a different release branch or architecture.
- Use a full package update when the required baseline is not present rather than applying an unrelated delta.
Rebuilding the delta against the correct baseline is the appropriate repair.
Microsoft: troubleshoot Windows app packages
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