Constraints false failure for unique index

Using seed in conjuction with Supabase, when attempting to add two auth.users, seed is failing because of a unique index on a field that is set to the empty string in both users. However, generating the SQL separately for each of the users and then running them sequentially succeeds (plus the empty string is the default value for the fields when users are added through the web interface). Therefore, I suspect it's an issue with the seed constraint checker, not an actual failure.

seed.ts:

import { copycat } from "@snaplet/copycat";
import { createSeedClient } from "@snaplet/seed";
import dotenv from "dotenv";

dotenv.config({ path: ".env.local" });

const main = async () => {
  const seed = await createSeedClient({dryRun: process.env.DRY !== "0"});

  // Truncate all tables in the database
  await seed.$resetDatabase();

  await seed.auth_users([
    {
      instance_id: "00000000-0000-0000-0000-000000000000",
      id: copycat.uuid("user1@example.com"),
      confirmation_token: "",
      confirmation_sent_at: null,
      email: "user1@example.com",
      encrypted_password:
        "xxxx",
    },
    {
      instance_id: "00000000-0000-0000-0000-000000000000",
      id: copycat.uuid("user2@example.com"),
      confirmation_token: "",
      confirmation_sent_at: null,
      email: "user2@example.com",
      encrypted_password:
        "xxxx",
    },
  ]);

  console.log("Database seeded successfully!");

  process.exit();
};

main();

The error:

% npx tsx seed.ts
my_app/node_modules/@snaplet/seed/dist/src/core/plan/constraints.js:155
                throw new Error([
                      ^

Error: Unique constraint "confirmation_token_idx" violated for model "auth_users" on fields (confirmation_token) with values ()
Seed: 0/auth_users/1
Model data: {
  "id": "51a6658d-732d-522f-8015-aad47c97271c",
  "aud": "Es ere desid potius quem, partitia consed allictorum si tamquam.",
  "role": "Eas victi sapiens cum effecta, quos placet quisquam circo ant.",
  "email_confirmed_at": "2020-11-03T10:26:36.000Z",
  "invited_at": "2020-06-06T17:31:39.000Z",
  "recovery_token": "Hoc vult vix dolorat quod susciplinguam sit dolordiamur.",
  "recovery_sent_at": "2020-05-13T04:44:39.000Z",
  "email_change_token_new": "Dolorum per dolore aliosae et.",
  "email_change": "Copulsa meliorum quis es saepe eorumquam inscientiam, te vero cum etiam adquiescerte sapiens desid possimis.",
  "email_change_sent_at": "2020-11-15T22:57:47.000Z",
  "last_sign_in_at": "2020-04-08T15:30:17.000Z",
  "raw_app_meta_data": {
    "Facet": "Abitur et"
  },
  "raw_user_meta_data": {
    "Sensu": "Repellere stoicosopho"
  },
  "is_super_admin": true,
  "created_at": "2020-12-28T12:15:12.000Z",
  "updated_at": "2020-12-28T11:17:59.000Z",
  "phone_confirmed_at": "2020-10-06T10:01:38.000Z",
  "phone_change_sent_at": "2020-07-23T18:47:30.000Z",
  "banned_until": "2020-06-02T17:55:35.000Z",
  "reauthentication_sent_at": "2020-03-27T02:29:07.000Z",
  "deleted_at": "2020-11-19T11:00:25.000Z",
  "instance_id": "00000000-0000-0000-0000-000000000000",
  "confirmation_token": "",
  "confirmation_sent_at": null,
  "email": "user2@example.com",
  "encrypted_password": "xxxx"
}
    at checkConstraints (my_app/node_modules/@snaplet/seed/dist/src/core/plan/constraints.js:155:23)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at Plan.generateModel (my_app/node_modules/@snaplet/seed/dist/src/core/plan/plan.js:219:13)
    at Plan.generate (my_app/node_modules/@snaplet/seed/dist/src/core/plan/plan.js:347:9)
    at Plan.run (my_app/node_modules/@snaplet/seed/dist/src/core/plan/plan.js:355:23)
    at main (my_app/supabase/seed.ts:19:3)

Node.js v20.16.0

The index:

CREATE UNIQUE INDEX confirmation_token_idx ON auth.users USING btree (confirmation_token) WHERE ((confirmation_token)::text !~ '^[0-9 ]*$'::text)

supabase-community / seed

Constraints false failure for unique index #191