Talk about it: in-depth communication to understand each other's ideas, what is the purpose, and whether there are some misunderstandings at work.
The second suggestion: after the talk, if it doesn't work, advise first. After all, we work together to make money. Why bother each other?
3. dismissal: for the sake of organization and development, it is a last resort. If persuasion fails, we should get rid of the black sheep. Long pain is better than short pain.