Nullable self-reference table relation

typescript: No overload matches this call.
     Overload 1 of 2, '(left: Aliased<null>, right: AnyColumn | Placeholder<string, any> | SQLWrapper | null): SQL<unknown>', gave the following error.
       Argument of type 'MySqlInt<{ tableName: "cuentas"; name: "padre_id"; data: number; driverParam: string | number; notNull: false; hasDefault: false; }>' is not assignable to parameter of type 'Aliased<null>'.
         Type 'MySqlInt<{ tableName: "cuentas"; name: "padre_id"; data: number; driverParam: string | number; notNull: false; hasDefault: false; }>' is missing the following properties from type 'Aliased<null>': sql, fieldAlias, getSQL
     Overload 2 of 2, '(left: MySqlInt<{ tableName: "cuentas"; name: "padre_id"; data: number; driverParam: string | number; notNull: false; hasDefault: false; }>, right: number | AnyColumn | Placeholder<...> | SQLWrapper): SQL<...>', gave the following error.
       Argument of type 'null' is not assignable to parameter of type 'number | AnyColumn | Placeholder<string, any> | SQLWrapper'. [2769]

import { relations } from "drizzle-orm";
import { int, mysqlTable, serial, varchar } from "drizzle-orm/mysql-core";

export const account = mysqlTable("account", {
  id: serial("id").primaryKey(),
  name: varchar("name", { length: 256 }),
  parentId: int("parentId"),
});

export const accountRelations = relations(account, ({ one }) => ({
  parent: one(account, {
    fields: [account.parentId],
    references: [account.id],
  }),
}));

import { drizzle } from "drizzle-orm/mysql2";
import mysql from "mysql2/promise";

import * as schema from "./schema";

const poolConnection = mysql.createPool({
  host: "host",
  user: "user",
  database: "database",
  password: "password",
});

export const db = drizzle(poolConnection, { schema });

await db.query.account.findMany({
  where: (account, { eq }) => eq(account.parentId, null)  // ERRORS HERE
})