Link ring outdoor motion sensor with light group in ring app

Hi. I have different ring light bulbs at home, divided in 2 groups. One for front of the house, one for the backyard. I just bought 2 outdoor motion sensors from Ring. I added one motion sensor in each light groups. I tried to link the motion sensor from front-house group to the light within this group, so has the motion sensor can turn on the front lights when motion is detected. Pretty basic. And the same for the backyard. However I have an issue. Automatically, the front motion sensor is proposing ONLY the light from the backyard group, and the back motion sensors the ones of the front light group. I tried to manually exchange group and motion sensor names to pair them properly, but automatically, it re-exchange to always have front sensor with back light and back sensor with front light. Any clue?