### Steps to reproduce

1. Login as a user with permissions to import Jira data

2. Start an import run for our DC instance

3. Choose project "DSIV - Reporting Ventes Groupe"

4. Import


### What is the buggy behavior?

* The import stops with an error status 404


### What is the expected behavior?

1. The import succeeds


### Technical Begin of the insertionreasoningEnd of the insertion Begin of the deletion reasonEnd of the deletion

Somewhere in this data there is a reference to user "JIRAUSER99700" 
this user is not available via the call Begin of the insertionin the [Jira importer](https://github.com/opf/openproject/blob/9875e98cb7a0cd3f1d3dc7b8bcc39b941b994ff6/app/workers/import/jira_fetch_and_import_projects_job.rb#L136).End of the insertion Begin of the deletion atEnd of the deletion

Begin of the insertionThe data Jira is sending is not clean. E.g. in this case it contains a user key which is not available in the Jira instance: Jira API returning 404. This stops the import. If we can't retrieve a user for a Jira user key, we just log the error but continue as we have no other option.


<figure class="image image_resized op-uc-figure" style="width:621px;"><div class="op-uc-figure--content"><img class="op-uc-image" src="/api/v3/attachments/919941/content"></div><figcaption class="op-uc-figure--description">The user is not available in Jira itself</figcaption></figure>




End of the insertion Begin of the deletion [https://github.com/opf/openproject/blob/9875e98cb7a0cd3f1d3dc7b8bcc39b941b994ff6/app/workers/import/jira\_fetch\_and\_import\_projects\_job.rb#L136](https://github.com/opf/openproject/blob/9875e98cb7a0cd3f1d3dc7b8bcc39b941b994ff6/app/workers/import/jira_fetch_and_import_projects_job.rb#L136)

End of the deletion ### Screenshots and other files

<img class="image_resized op-uc-image op-uc-image_inline" style="width:612px;" src="/api/v3/attachments/919895/content">

### Environment information

**OpenProject installation type**

* [x] All

**OpenProject version**

17.2

**Browser**

* [x] All

**Operating System**

* [x] All

**Language**

* [x] All