###

### Steps to reproduce

Begin of the insertionBug 1:

End of the insertion 1. Login and go to a project/Backlog in two different tabs

2. Make sure you have an active sprint

3. Click on more menu in tab 1

4. Select Complete sprint

5. In tab 2, drag and drop a wp from backlog to the completed sprint

6. Reload the page


Begin of the insertionBug 2:

1. Have a closed sprint

2. Go to a work package page

3. Open the dropdown for sprints


End of the insertion ### What is the buggy behavior?

Begin of the insertionBug 1:

End of the insertion * The wp disappears from the page as the sprint is also removed


Begin of the insertionBug 2:

* Closed sprints are displayed in the list to select from

* Selecting one of the closed sprints does not lead to an error


End of the insertion ### What is the expected behavior?

Begin of the insertionBug 1 & 2:

End of the insertion 1. It should not be possible to move the wp into an already completed sprint Begin of the insertion

2. Closed sprints should not be available options for assignment.End of the insertion


###

###

### Environment information

**Core build**

[7bed6678ea8d2bc9faa321c3e4b0c1495fec1a5e](https://qa.openproject-stage.com/external_redirect?url=https%3A%2F%2Fgithub.com%2Fopf%2Fopenproject%2Fcommit%2F7bed6678ea8d2bc9faa321c3e4b0c1495fec1a5e)

**Product version**

[1066bed7b1b4ed307bfeac4168b48ad668a6c1e6](https://qa.openproject-stage.com/external_redirect?url=https%3A%2F%2Fgithub.com%2Fopf%2Fsaas-openproject%2Fcommit%2F1066bed7b1b4ed307bfeac4168b48ad668a6c1e6)

**Core version**

OpenProject 17.3.0

**OpenProject version**

_If you're not running on the cloud edition, please specify the version of OpenProject you're running. Example: v12.1.5_

**Browser**

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

**Operating System**

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