---
title: "Delete a CI Relation Type by ID"
method: DELETE
path: "/cis/relation-types/{ciRelationTypeId}"
tags: ["CIs"]
---

# Delete a CI Relation Type by ID

`DELETE /cis/relation-types/{ciRelationTypeId}`

Delete the CI relation type. All CI links that use this relation type will be removed. Once deleted, the data cannot be recovered.

## Response `204`

The CI relation type is deleted.

## Other responses

- `400` — The request was invalid or cannot be served
- `401` — Authentication information is missing or invalid
- `404` — The specified resource was not found
- `409` — The request could not be completed due to a conflict with the current state of the resource. This typically occurs when attempting to create a duplicate resource, update a resource that has been modified by another process, or when business rules prevent the operation.

---

[API](https://skmtc.dev/sysaid/apis/sysaid-public-api.md) · [All operations](https://skmtc.dev/sysaid/apis/sysaid-public-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/sysaid/sysaid-public-api/revisions/38a43a1b2981/schema)