---
title: "Reverse Subgroup Merge"
method: POST
path: "/claims/{claim_id}/expenditures/subgroup-merge-events/{event_id}/reverse"
tags: ["expenditures"]
---

# Reverse Subgroup Merge

`POST /claims/{claim_id}/expenditures/subgroup-merge-events/{event_id}/reverse`

## Request

- Base URL: `https://api.claimkit.co` (the document declares no server; this is the origin it was published from)
- URL: `https://api.claimkit.co/claims/{claim_id}/expenditures/subgroup-merge-events/{event_id}/reverse`
- Auth: none declared

Reverse the merge recorded in ``event_id`` for this claim.

Restores every item still parked at the event's target back to its
pre-merge ``(category, subgroup_key, manual_override)`` tuple. Items
moved on or deleted since the merge are skipped (counted in the
response). 404 if no open event with that id; 409 if a later
un-reversed event must be reversed first (LIFO chain guard).

## Path parameters

- `claim_id` integer, required
- `event_id` integer, required

## Response `200`

Successful Response

- ReverseSubgroupMergeResponse
  - `status` string, required
  - `event_id` integer, required
  - `restored_count` integer, required
  - `skipped_count` integer, required

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/claimkit/apis/claimkit-api.md) - [All operations](https://skmtc.dev/claimkit/apis/claimkit-api/llms.txt) - [OpenAPI document](https://skmtc.dev/claimkit/apis/claimkit-api/revisions/94dc85ba5326?raw)