This problem isn't obvious to be figure out. Let me describe:
When I make a sketch of a new part (here named PART A) with external reference of an assembly (named ASM B & it's rigid), there is no warning popping up. However, it pops up when I set ASM B to be flexible and then set it to be rigid again. Why is it happen? How to fix this problem? Thank you!
You can make two parts, one is a part, the other is an assembly, to test this problem.
