> ## Documentation index > Fetch the complete documentation index at: https://upstash.com/docs/llms.txt > Ask it with GET https://upstash.com/docs/ask?q=. Short keywords rank best. > Use these to discover all available pages before exploring further. > Page rating: `GET https://upstash.com/docs/feedback?path=/docs/workflow/api-reference/dlq/resume/resume-single-id&helpful=true` (or `false`) records whether this page helped. An optional `comment` (URL-encoded, at most 500 characters) says what was missing or wrong. It is anonymous and needs no key. Comments hold no code, secrets or personal data. # Single ID > Resume one failed Workflow run by its DLQ ID. `POST /v2/workflows/dlq/resume/{dlqId}` When a workflow run fails, it's automatically moved to the DLQ (Dead Letter Queue) where it can be analyzed and resumed. The resume feature allows you to continue a failed workflow run from exactly where it failed, without re-executing successfully completed steps. This is particularly useful for long-running workflows where you don't want to lose progress from successful steps when a single step fails. When a workflow is resumed, it continues execution from the last failed step. A new workflow run ID is generated, but the workflow maintains the state and results from previously completed steps. You can make changes to the workflow code as long as these changes come after the failed steps. However, making changes before the failed step will break the code and is not allowed. For more details, check out [Handle workflow route code changes](/workflow/howto/changes) page. ## OpenAPI ````yaml workflow/openapi.yaml post /v2/workflows/dlq/resume/{dlqId} openapi: 3.1.0 info: title: Upstash Workflow REST API description: > Upstash Workflow is a serverless workflow orchestration service built on top of Upstash QStash and Upstash Redis. version: 2.0.0 contact: name: Upstash url: https://upstash.com servers: - url: https://qstash-{region}.upstash.io description: Regional variables: region: default: eu-central-1 enum: - us-east-1 - eu-central-1 security: - bearerAuth: [] - bearerAuthQuery: [] paths: /v2/workflows/dlq/resume/{dlqId}: post: tags: - DLQ summary: Resume Single ID x-mint: href: /workflow/api-reference/dlq/resume/resume-single-id metadata: title: Single ID sidebarTitle: Single ID description: Resume one failed Workflow run by its DLQ ID. content: > When a workflow run fails, it's automatically moved to the DLQ (Dead Letter Queue) where it can be analyzed and resumed. The resume feature allows you to continue a failed workflow run from exactly where it failed, without re-executing successfully completed steps. This is particularly useful for long-running workflows where you don't want to lose progress from successful steps when a single step fails. When a workflow is resumed, it continues execution from the last failed step. A new workflow run ID is generated, but the workflow maintains the state and results from previously completed steps. You can make changes to the workflow code as long as these changes come after the failed steps. However, making changes before the failed step will break the code and is not allowed. For more details, check out [Handle workflow route code changes](/workflow/howto/changes) page. parameters: - in: path name: dlqId required: true schema: type: string description: The DLQ ID of the workflow run to resume. - $ref: "#/components/parameters/DLQOverrideRetries" - $ref: "#/components/parameters/DLQOverrideDelay" - $ref: "#/components/parameters/DLQOverrideRetryDelay" - $ref: "#/components/parameters/DLQOverrideFlowControlKey" - $ref: "#/components/parameters/DLQOverrideFlowControlValue" - $ref: "#/components/parameters/DLQOverrideLabel" - $ref: "#/components/parameters/DLQOverrideFailureCallback" responses: "200": description: Workflow resumed successfully content: application/json: schema: type: object properties: workflowRunId: type: string description: The ID of the resumed workflow run (a new ID is generated for the resumed run). workflowCreatedAt: type: integer format: int64 description: The timestamp when the resumed workflow run was created (Unix timestamp in milliseconds). "400": description: Bad Request - Invalid DLQ ID, not a workflow message, or workflow doesn't support resume content: application/json: schema: $ref: "#/components/schemas/Error" "401": description: Unauthorized content: application/json: schema: $ref: "#/components/schemas/Error" "404": description: DLQ message not found content: application/json: schema: $ref: "#/components/schemas/Error" "500": description: Internal Server Error content: application/json: schema: $ref: "#/components/schemas/Error" components: securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: JWT description: QStash authentication token bearerAuthQuery: type: apiKey in: query name: qstash_token description: QStash authentication token passed as a query parameter schemas: Error: type: object required: - error properties: error: type: string description: Error message parameters: DLQOverrideRetries: name: Upstash-Retries in: header schema: type: integer description: Override the number of retries for the workflow steps. DLQOverrideDelay: name: Upstash-Delay in: header schema: type: string description: Override the delay before executing the workflow. Format is `` (for example, `10s` or `5m`). DLQOverrideRetryDelay: name: Upstash-Retry-Delay in: header schema: type: string description: Override the retry delay expression for the workflow steps. DLQOverrideFlowControlKey: name: Upstash-Flow-Control-Key in: header schema: type: string description: Override the flow control key for the workflow. DLQOverrideFlowControlValue: name: Upstash-Flow-Control-Value in: header schema: type: string description: Override the flow control configuration in the format `parallelism=, rate=, period=`. DLQOverrideLabel: name: Upstash-Label in: header schema: type: string description: Override the workflow labels. Use a comma-separated list for multiple labels, such as `label_1,label_2`. DLQOverrideFailureCallback: name: Upstash-Failure-Callback in: header schema: type: string description: Override the failure callback URL for the workflow. ````