**Related issue:** Resolves#49007
## Testing
- [x] QA'd all new/changed functionality manually
For unreleased bug fixes in a release candidate, one of:
- [x] Confirmed that the fix is not expected to adversely impact load
test results
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## Summary by CodeRabbit
* **Bug Fixes**
* Improved reliability when updating host-to-user mappings by ensuring
related mapping changes are completed as one transaction.
* Simplified certificate handling during mapping updates to provide more
consistent results.
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Konstantin Sykulev
81e5634f74