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

# Mutually Exclusive Pre-Payment Settings

> Groups are allowed only one pre-payment policy

## Cause

Cannot set more than one pre-payment policy for this group.

## Fix

Set `prePaymentStrategy` to the intended strategy, clear the other policy, and retry.

## Retry safety

Not retryable until the underlying state or request changes.

## Raised by

These operations can return this problem:

* [Update smart group rules](/api-reference/clients/update-smart-group-rules)

## Example

```json theme={null}
{
  "type": "https://docs.guile.app/problems/mutuallyExclusivePrePaymentSettings",
  "title": "Mutually Exclusive Pre-Payment Settings",
  "status": 422,
  "detail": "Cannot set more than one pre-payment policy for this group."
}
```