**Reproduce**

1. Go to https://org-dev.qa.finn.de/projects/openproject/work\_packages/details/23367/overview
2. Begin of the insertionHave required custom fields defined for the project/type.
3. End of the insertion Assign a budget (e.g. “Example Begin of the insertionbudget”) or make any other change.End of the insertion Begin of the deletion budget”).End of the deletion
Begin of the insertion4.End of the insertion Begin of the deletion 3.End of the deletion Click save.

**Actual**

- Error message which misses part of the text.
- Begin of the insertionThe workEnd of the insertion Begin of the deletion WorkEnd of the deletion package Begin of the insertioncan notEnd of the insertion Begin of the deletion cannotEnd of the deletion be Begin of the insertionupdated.End of the insertion Begin of the deletion updated (unclear why).End of the deletion

**Expected**

- Begin of the insertion<s>WPEnd of the insertion Begin of the deletion WPEnd of the deletion can be Begin of the insertionupdated.</s> (only after the error is fixed)
- The error message signals the erroneous field.End of the insertion Begin of the deletion updated.End of the deletion

**Further information**

This is most likely an incomplete API error (cf., `convert_ar_to_api_errors` in `lib/api/errors/error_base.rb`)

**Screenshot**

**QA system**

- OP 5.0.0
- org-dev.qa.finn.de