1. link two tasks using "**Child"**

2. From the parent work package, Open the three dots menu in the top right corner and select "Duplicate"

3. In the work package create page, click "Save" button at the bottom


**Actual result:**

The work package create page is still displayed with the error: "_Manual scheduling cannot be set to false (automatically scheduled) as it has no predecessors or children._"

[21..11\_2025-11-21\_15.1.mp4](https://community.openproject.org/attachments/870533/21..11_2025-11-21_15.1.mp4)

**Expected result**

The Begin of the insertionwork packageEnd of the insertion Begin of the deletion taskEnd of the deletion is duplicated and Begin of the insertionautomatically goes toEnd of the insertion Begin of the deletion picksEnd of the deletion manual scheduling Begin of the deletion automaticallyEnd of the deletion as it has no children. Begin of the insertion(The child relations are not duplicated)End of the insertion

**Notes**

When choosing "Duplicate in another project" (from three dots menu) or "Bulk copy" (from work packages list), the problem does not occur because the children are copied too.

The problem also occurs if the work package has predecessors: the relations are not copied when duplicating a work package and so the same error is displayed. They are copied only with "Duplicate in another project" or "Bulk copy"

**Version**

OpenProject 16.6.4

**Browser**

* [x] Chrome
* [x] Firefox
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**Operating System**

* [x] Windows
* [x] Mac OS X
* [ ] Mobile iOS
* [ ] Mobile Android
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