Prisma

Hello :sunny:

I have this kind of models in my schema
```model Something {
  id        String     @id @default(dbgenerated("nanoid(\'SMTH_\')"))
  createdAt DateTime   @default(now())
  updatedAt DateTime   @updatedAt

  ....other fields....
}```
_(All of them have that default dbgenerated thing for the `id` column)_

Whenever I try to do a migration using `prisma migrate dev` the tool keeps trying to add the following SQL to the migration for all the tables:
```ALTER TABLE "something" ALTER COLUMN "id" SET DEFAULT nanoid('SMTH_');```
Even though it has been correctly set on the initial migration:
```CREATE TABLE "something" (
    "id" TEXT NOT NULL DEFAULT nanoid('SMTH_'),
    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updatedAt" TIMESTAMP(3) NOT NULL,

    CONSTRAINT "something_pkey" PRIMARY KEY ("id")
);```
I keep removing them by hand, but is it possible for it not to create that everytime? :smile:

Btw, I'm using `prisma@3.9.1` with `postgres:10.13` , I can't tell if it happened on previous versions, I did my setup this week :smile: