Conflict became a negative thing for a te​‌‍‍‍‌‍‍‌‍‌‌‍‍‍‌‍‌‌‌‍​am

I​‌‍‍‍‌‍‍‌‍‌‌‍‍‍‌‍‌‌‌‍​n your experience, have you ever been in a situation in which conflict became a negative thing for a te​‌‍‍‍‌‍‍‌‍‌‌‍‍‍‌‍‌‌‌‍​am? How was the conflict handled? How can a team manager ensure that conflict is handled constructively​‌‍‍‍‌‍‍‌‍‌‌‍‍‍‌‍‌‌‌‍​?