[Bug]: SHS Token generated for wrong device, when users have multiple devices

### Preflight Checklist

- [x] I have read the [Contributing Guidelines](https://github.com/EnAccess/micropowermanager/blob/main/CONTRIBUTING.md) for this project, if it exists.
- [x] I agree to follow the [Code of Conduct](https://github.com/EnAccess/micropowermanager/blob/main/CODE_OF_CONDUCT.md) that this project adheres to.
- [x] I have searched the [issue tracker](https://github.com/EnAccess/micropowermanager/issues) for a feature request that matches the one I want to file, without success.

### Expected Behavior

When a SHS Token is generated, it should be generated for the Device a payment is made for.

### Actual Behavior

When users have multiple Devices. It **sometimes** happens, that the Token is generated for a wrong device.

### Steps to reproduce

Unfortunately, we haven't found a clear way to reproduce this yet. The bug appeared when using SunKing SHS and Cash Transactions.

### What operating system(s) are you using?

macOS

### Additional Information

To rule out any human error when collecting cash transactions, it would be great to implement: https://github.com/EnAccess/micropowermanager/issues/903