Can't find file for asset & failed to load ...Referenced by...

Hello everyone,
I have Import some .fbx model files into my project , and I delete some of their materials.
When I reopen my project , it appears these errors and warnings.
Is there some good ways to fix these?
thanks!

check if ‘fix up redirectors’ option works…

oppps , It didn’t work .

than either change the all those referenced materials with some other or restore what u hav deleted…