### **Environment**:

Your OpenProject Version: **OpenProject 10.3.0** (PostgreSQL)

Windows 10 / Firefox 71.0, Chrome 79/ Language: de

### **Logs**

No errors in browser console, No special warnings or errors in openproject's logs.

### **Steps to reproduce:**

1. Begin of the insertionEnable Backlogs
2. CreateEnd of the insertion Begin of the deletion Go toEnd of the deletion a Begin of the insertionparent WP with at least onEnd of the insertion child Begin of the insertionWP.End of the insertion Begin of the deletion working package, which has Version attribute filled and no child working packages, Parent working package has an empty Version attributEnd of the deletion
Begin of the insertion3.End of the insertion Begin of the deletion 2.End of the deletion Begin of the insertionSet a version for the parent. --> The version should correctly be inherited by the children.
4. Remove the version from the parent --> Child keeps its version incorrectly.
5. TryEnd of the insertion Begin of the deletion tryEnd of the deletion to change the Begin of the insertionversionEnd of the insertion Begin of the deletion VersionEnd of the deletion attribute Begin of the insertionof the childEnd of the insertion
Begin of the insertion6.End of the insertion Begin of the deletion 3.End of the deletion Error appears, that Version is locked

### **Actual Behavior**

Begin of the insertion* When the version of the parent is removed, the child keeps its version.
* End of the insertion Error appears, Version attribute cannot be changed.

### **Expected Behavior**

Begin of the insertion* Removing the version of the parent shouldEnd of the insertion Begin of the deletion No errors, Version attribute canEnd of the deletion be Begin of the insertioninherited by the children.End of the insertion Begin of the deletion changed.End of the deletion