Material Disconnected from Assets upon Migrating

hey guys, so i need to migrate my level to another project, but most of my material disconnected from their assets when i migrated.
And i noticed the material that disconnected doesnt leave “Redirectors” file when moved
i’m not sure if this is the problem, can anyone help me on this one? because i have a lots of material and assets, it would take so much time if i relink it one by one

thanks in advance :slight_smile: