Prisma

If possible would like to have some insights on an issue. For some reason, I'm getting the following error.
```
Deploying service `default` to stage `default` to server `local`!

ERROR: There is a relation ambiguity during the migration. Please, first name the old relation on your schema. The ambiguity is on a relation between Member and Message. Please name relations or change the schema in steps.
```

But the issue only happens in the staging environment. We're using the latest version locally and on the staging site (`prisma/1.21.1 (darwin-x64) node-v10.14.1`). We haven't deploy anything to prod. I guess the first time will be ok, but if this issue appears again we don't know how to fixed.

The only way the issue stop happening was deleting `prisma delete` and then `prisma deploy`. But we can't afford that on production, cause we're going to lose the data.