Keyboard Manager Configuration File Corrupted by Rebinding } to any other key

### Microsoft PowerToys version

0.100.2

### Installation method

PowerToys auto-update

### Area(s) with issue?

Keyboard Manager

### Steps to reproduce

I work with two keyboard layouts, English (US) and Spanish (Latin America). My backspace and enter keys broke a while ago, so I've been using Keyboard Manager to rebind those two essential keys to other functions. \ and } are located on the same key depending on which keyboard layout I'm using, so I wanted to rebind both of them to backspace. Here are the key rebinds I have:

After closing the Keyboard Manager editor and opening it back up again, here is what appears:

Taking }'s place, is /. } still is bound to backspace, even if it doesn't show up. All the rebinds work. However, now it is impossible to delete, add, or turn off/on any rebinds. The only way to fix it is to delete the default.json file at %localappdata%\Microsoft\PowerToys\Keyboard Manager, and to remake the previous configuration.

### ✔️ Expected Behavior

I expect the } to backspace rebind to work normally, so that every time I press }, backspace is inputted instead.

### ❌ Actual Behavior

After rebinding }, the configuration file (default.json) is permanently corrupted, and attempting to create, delete, or toggle any rebinds no longer works.

### Upload Bug Report ZIP-file

[PowerToysReport_2026-06-26-18-52-28.zip](https://github.com/user-attachments/files/29399405/PowerToysReport_2026-06-26-18-52-28.zip)

### Additional Information

OS version: Windows 11
.Net version: .NET 8.0.14
System Language: English (US)
User or System Installation: System Installation
Running as admin: Yes

### Other Software

_No response_

Start by reproducing the Keyboard Manager editor steps with English (US) and Spanish (Latin America) layouts, then inspect %localappdata%\Microsoft\PowerToys\Keyboard Manager\default.json before and after rebinding }. Verify that the configuration remains valid and that the affected rebind can be created, deleted, and toggled without deleting default.json.

Written by the indexing model from the issue text.