# What this PR does
Add first internal api error code and add "resolution_note" param to
resolve endpoint
## Which issue(s) this PR fixes
It fixes resolving alert groups via mobile app when resolution note is
required
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [ ] Documentation added (or `pr:no public docs` PR label added if not
required)
- [ ] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)
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