Multiple WBS on first level and not deleted properly
I have a scenario
1. Create project definition L-00001 and first level WBS L-00001
2. In the same level(First level) the user created L-00001-01 and saved but there is validation in level1 they cannot create it, he succeeded to save it
Issue: If they open the project hierarchy the WBS L-00001-01 is not visible, but they open only the WBS L-00001-01 it is visible.
3.When they are uplaoding WBS's to the Business warehouse giving error message "The WBS L-00001-01 is not in the hierarchy"
4.They have deleted(Deletion flag) the WBS L-00001-01,again tried to upload to business warehouse giving the same error message "The WBS L-00001-01 is not in the hierarchy"
Please give me hints