> ## Documentation Index > Fetch the complete documentation index at: https://docs.lerian.studio/llms.txt > Use this file to discover all available pages before exploring further. # Promote a loan product version to current > Repoints a LIVE loan product at another of its versions. New loan applications originate on the promoted version from this moment; every contract and every application already in flight keeps the version it was born on, and its schedule, pricing and charges go on being read from that version. The product must already be active — activation is the door its first version comes through — and the version must be one of this product's own. ## OpenAPI ````yaml /en/openapi/v3-current/lender.yaml post /api/v1/loan-products/{id}/promote openapi: 3.1.0 info: contact: email: contact@lerian.studio name: Lerian Studio url: https://lerian.studio description: >- Code-first OpenAPI 3.1 surface for the Lender service. Routes that move money are at-most-once per X-Idempotency: when one answers 5xx, the X-Idempotency-Fenced response header says whether that key is now refusing resends (true) or free to retry (false or absent). See docs/contracts/money-route-idempotency.md. license: name: Lerian Studio General License title: Lender API version: 1.0.0 servers: - url: https://lender.sandbox.lerian.net security: - BearerAuth: [] tags: - description: >- Caller session projection: validated subject and effective permissions for the presented token. name: Session - description: >- Ledger accounting operations: journal entries and accrual postings for loan accounts. name: Accounting - description: >- Loan application intake and lifecycle: submission, decisioning, and status. name: LoanApplications - description: >- Loan product catalog: definition, versioning, and activation of lending products. name: LoanProducts - description: >- Loan account servicing operations: balances, schedules, and account-level actions. name: Loan Accounts - description: >- Portfolio dashboard read operations: aggregated portfolio and performance views. name: Dashboard - description: >- Jurisdiction registry: supported jurisdiction profiles and their capabilities. name: Jurisdictions - description: >- Jurisdiction-specific loan application operations (Brazil origination surface). name: Loan Applications - description: >- Tax computation operations for jurisdiction-specific lending (e.g. Brazil IOF). name: Tax - description: >- Brazil consignado privado operations: contract lifecycle, exclusion repair, and compensating adjustments. name: Consignado - description: >- Credit-instrument document template registry: versioned drafting and publication of CCB clausulado. name: DocumentTemplates paths: /api/v1/loan-products/{id}/promote: post: tags: - LoanProducts summary: Promote a loan product version to current description: >- Repoints a LIVE loan product at another of its versions. New loan applications originate on the promoted version from this moment; every contract and every application already in flight keeps the version it was born on, and its schedule, pricing and charges go on being read from that version. The product must already be active — activation is the door its first version comes through — and the version must be one of this product's own. operationId: promoteLoanProductVersion parameters: - description: Loan product identifier. in: path name: id required: true schema: description: Loan product identifier. examples: - 550e8400-e29b-41d4-a716-446655440000 format: uuid type: string requestBody: content: application/json: schema: $ref: '#/components/schemas/PromoteLoanProductVersionHumaInputBody' required: true responses: '200': content: application/json: schema: $ref: '#/components/schemas/LoanProductHumaBody' description: OK '401': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Unauthorized '403': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Forbidden '404': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Not Found '409': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Conflict '422': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Unprocessable Entity '500': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Internal Server Error '503': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Service Unavailable components: schemas: PromoteLoanProductVersionHumaInputBody: additionalProperties: false properties: versionId: description: >- Loan product version that new applications should originate on from now on. It must be a version of this product. examples: - 550e8400-e29b-41d4-a716-446655440001 format: uuid type: string required: - versionId type: object LoanProductHumaBody: additionalProperties: false properties: createdAt: description: Creation timestamp (RFC3339, UTC). examples: - '2026-06-14T12:00:00Z' type: string currentVersionId: description: >- Identifier (uuid) of the pinned active version; empty until activation. examples: - 550e8400-e29b-41d4-a716-44665544000a type: string id: description: Server-assigned loan product identifier (uuid). examples: - 550e8400-e29b-41d4-a716-446655440009 type: string jurisdictionCode: description: Jurisdiction profile code (e.g. BR). examples: - BR type: string loanType: description: Loan product type. examples: - personal type: string name: description: Loan product display name. type: string status: description: Lifecycle status (e.g. draft|active). examples: - active type: string required: - id - name - loanType - status - jurisdictionCode - createdAt type: object Detail: additionalProperties: false properties: code: description: >- Stable, machine-readable domain error code scoped to the emitting service (format: -NNNN). type: string detail: description: >- A human-readable explanation specific to this occurrence of the problem. examples: - Property foo is required but is missing. type: string errors: description: Optional list of individual error details items: $ref: '#/components/schemas/ErrorDetail' type: - array - 'null' instance: description: >- A URI reference that identifies the specific occurrence of the problem. examples: - https://example.com/error-log/abc123 format: uri type: string status: description: HTTP status code examples: - 400 format: int64 type: integer title: description: >- A short, human-readable summary of the problem type. This value should not change between occurrences of the error. examples: - Bad Request type: string type: default: about:blank description: A URI reference to human-readable documentation for the error. examples: - https://example.com/errors/example format: uri type: string upstream: $ref: '#/components/schemas/Upstream' description: >- RFC 9457 extension member: the error a proxied third-party provider reported. Absent unless the emitting service explicitly surfaced one. type: object ErrorDetail: additionalProperties: false properties: location: description: >- Where the error occurred, e.g. 'body.items[3].tags' or 'path.thing-id' type: string message: description: Error message text type: string value: description: The value at the given location type: object Upstream: additionalProperties: false properties: code: description: The upstream provider's own error code, verbatim. examples: - E4001 type: string message: description: >- The upstream provider's own error message, verbatim (bounded, never its raw response body). examples: - account not found at provider type: string type: object securitySchemes: BearerAuth: bearerFormat: JWT description: JWT bearer token issued by the identity provider. scheme: bearer type: http ````