CHW-4618 RepoTeamMappingConflict
repo→team mapping with this pattern already exists in the organisation
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Default message: repo→team mapping with this pattern already exists in the organisation
HTTP status:409(client)
Problem. Creating a repo→team mapping returned 409. Cause. A mapping with the same pattern already exists in this org. Fix. Update the existing mapping instead of creating a new one, or pick a different pattern. HTTP 409.