You have deleted a forest relation. Please undelete it.
I recommend you to undelete relation rather than creating a new one.

Wrong tagging!! You have mixed tags of highways with waterways. Please fix the tagging.

Wrong tagging. Landuse= Agriculture is not valid.
Also you are trying to create landuse that already exists. Please fix the errors you have created.

Overlapping forest created. Please fix !!

Wrongly tagged highway, that is not a primary highway.

duplicated landuse

Ok do as per your choice.

old_VDC represents the previous local government (village development committee) in which the particular hamlet belonged. The VDC has now restructured as Rural Municipality.

Don't delete old_VDC tag. It is sometimes necessary for tracing past local government structure.

You tagged forest as road and named it. Also your category of road was wrong.
I am undoing your changes.

Read this wiki for proper road tagging guide: highway=*