### Steps to reproduce

1. Login and create a project A with wp X

2. On Backlogs page, create a sprint and move your wp X to that sprint

3. Go to project settings and from the menu select Copy

4. Proceed with copying the project A

5. When the copy is done, go to project A, backlogs page and start your sprint, then try to complete it


### What is the buggy behavior?

* Work package from the copied project is assigned the same sprint from the original project. Even though it's invisible in the sprint itself on the original project, it gets mentioned in the modal when we're about to complete the sprint

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&nbsp;<img class="op-uc-image op-uc-image_inline" src="/api/v3/attachments/922440/content">


### What is the expected behavior?

1. Work package from the copied project should not be assigned the same sprint Begin of the insertionbut rather to a copy of it. That is, unless the sprint was shared with the copied project. As a result, the work packageEnd of the insertion Begin of the deletion andEnd of the deletion should not be mentioned in the modal when the sprint is about to be completed


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### Environment information

**OpenProject version**

_17.6_