Stereo IMU camera, when mapping, map mappoint whether repreat

[cjsJack]

Dears:
Using stereo IMU camera, maplab will using one camera for motiong tracking, other cameras will be used for feature tracking and mapping. Left camera will track feature, add new landmark and triangulate the point, and right camera will also do the same. So, whether these landmark wil be repeat? because most of these image feature are same.