### Steps to reproduce

1. Login as a user with permissions to create WPs

2. **Go to a sub-project**

3. Click on the `+` button in the main header

4. Create any ticket, type and content doesn't matter

5. Click on Save


### What is the buggy behavior?

* Browser throws an 'Are you sure' warning message


### What is the expected behavior?

1. Yes I'm sure

2. No error


### Screenshots and other files

<img class="op-uc-image op-uc-image_inline" src="/api/v3/attachments/252062/content">

### Environment information

**OpenProject version**

Core build

[8d399ab740e42eab52b8cc9fe5618d0d16187cde](https://github.com/opf/openproject/commits/8d399ab740e42eab52b8cc9fe5618d0d16187cde)

Product version

[aeb0182d44b0949cfe7bd6fb828f50fbf9d3c387](https://github.com/opf/saas-openproject/commits/aeb0182d44b0949cfe7bd6fb828f50fbf9d3c387)

Core version

OpenProject 15.3.0

**Browser**

* [ ] Chrome
* [x] Firefox 135
* Begin of the insertion[x] Firefox 136
* End of the insertion [ ] Safari
* [ ] Mobile Safari
* [ ] Other (please specify)

**Operating System**

* [x] Windows 11Pro
* [ ] Mac OS X
* [ ] Mobile iOS
* [ ] Mobile Android
* [ ] Linux (please specify distro)
* [ ] Chrome OS
* [ ] Other (please specify)