Locking: ServerSideRendered block error

[Soean]

Description

If I lock a server side rendered block, I see an error.

Step-by-step reproduction instructions

1. Add a server side rendered block like Latest comments
2. Lock block
3. See error This block has encountered an error and cannot be previewed.

Screenshots, screen recording, code snippet

{
   "code":"rest_invalid_param",
   "message":"Invalid parameter(s): attributes",
   "data":{
      "status":400,
      "params":{
         "attributes":"lock is not a valid property of Object."
      },
      "details":{
         "attributes":{
            "code":"rest_additional_properties_forbidden",
            "message":"lock is not a valid property of Object.",
            "data":null
         }
      }
   }
}

Environment info

• WordPress 6.0 nightly
• Gutenberg 13.0

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes