A selective sync conflict happens when you create a folder with the same name and in the same location as an unsynced folder.
If you try to sync both folders, the newer folder will be appended with the words “selective sync conflict”.
Example of a selective sync conflict
Imagine you create a folder called "Taxes." If you uncheck "Taxes" in your selective sync preferences, this will stop "Taxes" from syncing to the Dropbox folder on your computer. If you then create a new folder called "Taxes" in the same location on your computer, Dropbox won't sync that folder. If you then sync both the original "Taxes" folder in your account and the new "Taxes" folder on your computer, the new one will be appended with the words “selective sync conflict”.
All of your files are still safe in both folders. Here are some options you can take:
If you’d like to avoid selective sync conflicts in the future, check your Dropbox account online to make sure the folder you’re about to create doesn’t already exist in the same location.
You may get an error message related to a different type of file conflict. Learn how to resolve each type: