> ## Documentation Index
> Fetch the complete documentation index at: https://trigger-v3-trigger-api-redesign.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# io.unregisterCron()

> `io.unregisterCron()` allows you to unregister a [DynamicSchedule](/sdk/dynamicschedule) that was previously registered with `io.registerCron()`.

<Warning>
  This has been deprecated in favor of [DynamicSchedule.unregister](/sdk/dynamicschedule/unregister)
</Warning>

## Parameters

<Snippet file="stable-key-param.mdx" />

<ResponseField name="dynamicSchedule" type="DynamicSchedule" required>
  A [DynamicSchedule](/sdk/dynamicschedule) that will trigger any Jobs it's attached to on a regular
  interval.
</ResponseField>

<ResponseField name="id" type="string" required>
  A unique id for the schedule. This is used to identify and unregister the schedule later.
</ResponseField>

## Returns

A Promise with the following shape:

<ResponseField name="ok" type="boolean" required>
  Whether the schedule was successfully unregistered.
</ResponseField>

<RequestExample>
  ```typescript
  client.defineJob({
  id: "unregister-job",
  name: "Unregister dynamic schedule",
  version: "0.1.1",
  trigger: eventTrigger({
    name: "schedule.unregister",
    schema: z.object({
      id: z.string(),
    }),
  }),
  run: async (payload, io, ctx) => {
    //unregisters a DynamicSchedule with a CRON 
    await io.unregisterCron("❌📆", dynamicSchedule, payload.id);
  },
  });
  ```
</RequestExample>