> ## Documentation Index
> Fetch the complete documentation index at: https://docs.apsio.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Give a merged fingerprint its own issue back

> Takes one fingerprint out of this issue (D102): it is its own issue again, Unresolved, with no state; this issue keeps its state and its other fingerprints. Only a fingerprint merged into this issue. Same callers as state changes (issues:write), audited as issue.unmerge. Send `Content-Type: application/json`.



## OpenAPI

````yaml /api-reference/openapi.json post /projects/{projectId}/issues/{issueId}/unmerge
openapi: 3.1.0
info:
  title: Apsio API
  version: 0.1.0
  description: >-
    Read API v0: your projects, release health and comparisons, missing symbols,
    issues, sessions, vitals, cohort comparisons, performance (app start,
    screens, hangs, MetricKit) and network endpoints and traces for one project.
    Authenticate with a project token as a bearer token, with an OAuth access
    token from Apsio's authorization server (MCP clients), or, from the console,
    with the session cookie of a member of the project's organization.
servers:
  - url: https://api.apsio.io/v1
security: []
paths:
  /projects/{projectId}/issues/{issueId}/unmerge:
    post:
      summary: Give a merged fingerprint its own issue back
      description: >-
        Takes one fingerprint out of this issue (D102): it is its own issue
        again, Unresolved, with no state; this issue keeps its state and its
        other fingerprints. Only a fingerprint merged into this issue. Same
        callers as state changes (issues:write), audited as issue.unmerge. Send
        `Content-Type: application/json`.
      parameters:
        - schema:
            type: string
            pattern: ^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$
            example: 0192f3a4-0000-7000-8000-00000000a101
          required: true
          name: projectId
          in: path
        - schema:
            type: string
            pattern: ^[A-Za-z0-9._:-]{1,128}$
            description: The issue fingerprint.
          required: true
          description: The issue fingerprint.
          name: issueId
          in: path
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                fingerprint:
                  type: string
                  pattern: ^[A-Za-z0-9._:-]{1,128}$
              required:
                - fingerprint
              additionalProperties: false
      responses:
        '200':
          description: The fingerprint, its own issue again.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/IssueUnmerge'
        '400':
          description: 'Not valid: an issue id, or no other issue to merge.'
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: No valid bearer token or console session.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '403':
          description: >-
            Not allowed: the sandbox, a project token without the issues:write
            scope, or an agent without its issues:write grant (grant_required,
            grant_expired, with grant_url).
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/WriteRefusal'
        '404':
          description: No such project, or the fingerprint is not merged into this issue.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '409':
          description: >-
            Past the caps: an issue owns at most 100 fingerprints, a project at
            most 2,000 merged ones.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '415':
          description: The body is not JSON.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '422':
          description: Resolving in a release of an app that is not in this project.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '429':
          description: Too many changes; try again shortly.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '503':
          description: Merging issues is not available here.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      security:
        - bearer: []
        - session: []
components:
  schemas:
    IssueUnmerge:
      type: object
      properties:
        id:
          type: string
          description: The fingerprint, its own issue again.
        from:
          type: string
          description: The issue it left.
      required:
        - id
        - from
    Error:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              example: invalid_request
            message:
              type: string
          required:
            - code
            - message
      required:
        - error
    WriteRefusal:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              example: grant_required
            message:
              type: string
            grant_url:
              type: string
              description: >-
                grant_required and grant_expired for an OAuth client: the
                console page (Agents > Agent access) where the user gives this
                client the capability.
          required:
            - code
            - message
      required:
        - error
  securitySchemes:
    bearer:
      type: http
      scheme: bearer
      description: >-
        A project token (apsio_pt_v0...), which reads exactly one project, or an
        OAuth access token issued for the API, which reads what its user can.
        Access tokens issued for Apsio's MCP server are accepted only from the
        MCP server itself.
    session:
      type: apiKey
      in: cookie
      name: apsio_session
      description: >-
        The console session, set by /v1/auth/callback (`__Host-apsio_session`
        when host-only).

````

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