Libsql mapHranaError

//schema.ts
import { sqliteTable, text } from 'drizzle-orm/sqlite-core';
 
export const assignments = sqliteTable('assignments', {
    id: text('id').primaryKey(),
    name: text('name'),
    dateCreated: text('dateCreated'),
  }
);

// dbUtils.ts
import { drizzle } from 'drizzle-orm/libsql';
import { eq } from 'drizzle-orm';
import { createClient } from '@libsql/client';
import { assignments } from '../db/schema'; 
import { Assignment } from './types';

// define constants
const client = createClient({
  url: process.env.TURSO_URL ,
  authToken: process.env.TURSO_AUTH_TOKEN,
});

const db = drizzle(client);

export async function getAssignment(assignmentid:string){
  const assignmentList = await db.select().from(assignments).where(eq(assignments.id, assignmentid)).execute();
  return assignmentList;
}

// define the function
async function checkAssignmentState(assignmentid:string) {
  const assignmentList = await db.select().from(assignments).where(eq(assignments.id, assignmentid)).execute();
  if (assignmentList.length === 0) {
    const state: string = "null";
    return state;
  }
  return assignmentList;
}

async function writeAssignment(assignment:Assignment) {
  const date = new Date().toUTCString(); // notiible bug 
  await db.insert(assignments).values([{ id: assignment.id, name: assignment.name, dateCreated: date }]).execute();
}

export async function coreDB(assignment:Assignment){
    const id = assignment.id
    const state = await checkAssignmentState(id);
    if (state === "null") {
        await writeAssignment(assignment);
    }
    else {
        return state;
    }
}

try{
  const output = await db.select().from(assignments).execute();
  console.log(output)
}
catch(error){
  console.log(error);
}