### Steps to reproduce

1. Login as an admin

2. Begin of the insertionHave at least one custom field of type scored list

3. End of the insertion Go to Administration > Work packages > Custom actions

Begin of the insertion4.End of the insertion Begin of the deletion 3.End of the deletion Click on + Custom Action or edit an existing one


### What is the buggy behaviour?

* 500 error


### What is the expected behaviour?

1. User can edit or create a custom action


###

### Screenshots and other files

<img class="op-uc-image op-uc-image_inline" src="/api/v3/attachments/785536/content"> Begin of the deletion

End of the deletion <img class="op-uc-image op-uc-image_inline" src="/api/v3/attachments/785537/content">

### Environment information

**OpenProject version**

Core build

[fa650bc05bc76ce4fc169ff4dd400e0cf77b0359](https://github.com/opf/openproject/commits/fa650bc05bc76ce4fc169ff4dd400e0cf77b0359)

Product version

[cc67b82eacb29b0ad1bdb09b108f166bdea45ab0](https://github.com/opf/saas-openproject/commits/cc67b82eacb29b0ad1bdb09b108f166bdea45ab0)

Core version

OpenProject 16.5.0

**Browser**

* [ ] Chrome
* [x] Firefox
* [ ] Safari
* [ ] Mobile Safari
* [ ] Other (please specify)

**Operating System**

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