▶ pulumi up
Previewing update (dev):
     Type                 Name        Plan     Info
     pulumi:pulumi:Stack  create-dev
     └─ aws:s3:Bucket     test                 1 error

Diagnostics:
  aws:s3:Bucket (test):
    error: preparing urn:pulumi:dev::create::aws:s3/bucket:Bucket::test's old property state: expected string or JSON map; got <nil>