NodeJS ValidationException: The provided key element does not match the schema - node.js

Question

I know this has been asked before but I've tried everything from previous posts and still couldn't find a solution for my problem. I can query the table from DynamoDB no problem but can't from lambda. I deleted and created the table with the same name to get rid of a sort key hoping to fix my issue but it did not fix it too. So here is my code
Params
const queryParams = {
TableName: tableName,
KeyConditionExpression: 'postId = :postId',
ExpressionAttributeValues: { ":postId": postId }
};
Schema
type LikeRelationship
#model(
mutations: {
create: "createLikeRelationship"
delete: "deleteLikeRelationship"
update: null
}
timestamps: null
)
#auth(
rules: [
{
allow: owner
ownerField: "likerId"
operations: [read, create, delete]
}
{ allow: public, provider: iam, operations: [read] }
]
)
#key(fields: ["postId"]) {
postId: ID!
postOwnerId: String!
likerType: String
likerName: String
likerId: ID!
timestamp: Int!
}
Full Lambda Code
/* Amplify Params - DO NOT EDIT
API_GROOVESECONDED_GRAPHQLAPIIDOUTPUT
API_GROOVESECONDED_LIKERELATIONSHIPTABLE_ARN
API_GROOVESECONDED_LIKERELATIONSHIPTABLE_NAME
ENV
REGION
Amplify Params - DO NOT EDIT */
exports.handler = async (event, context, callback) => {
const AWS = require('aws-sdk');
const docClient = new AWS.DynamoDB.DocumentClient({ apiVersion: '2012-08-10' });
const tableName = 'LikeRelationship-76mphdcsf5cijbgq5kkcny3xpe-staging';
async function deleteItems(tableName, postId ) {
const queryParams = {
TableName: tableName,
KeyConditionExpression: 'postId = :postId',
ExpressionAttributeValues: { ":postId": postId }
};
const queryResults = await docClient.query(queryParams).promise();
if (queryResults.Items && queryResults.Items.length > 0) {
const batchCalls = chunks(queryResults.Items, 25).map( async (chunk) => {
const deleteRequests = chunk.map( item => {
return {
DeleteRequest : {
Key : {
'partitionId' : item.partitionId,
'sortId' : item.sortId,
}
}
};
}
);
const batchWriteParams = {
RequestItems : {
[tableName] : deleteRequests
}
};
await docClient.batchWrite(batchWriteParams).promise();
});
await Promise.all(batchCalls);
}
}
if (event.body !== null && event.body !== undefined) {
let data = JSON.parse(event.body);
if (typeof data.postId === 'undefined') {
return sendRes(404, '{ error: true, message: "postId undefined." }');
}
try {
await deleteItems(tableName, data.postId );
} catch (e) {
return sendRes(404, '{ error: true, message: " ' + e + data.postId + typeof data.postId + ' " }');
}
return sendRes(200, '{ "error": false, "message": "Success" }');
}
return sendRes(404, '{ error: true, message: "Event body null or undefined." }');
};
const sendRes = (status, body) => {
var response = {
statusCode: status,
headers: {
"Content-Type" : "application/json",
"Access-Control-Allow-Headers" : "Content-Type,X-Amz-Date,Authorization,X-Api-Key,X-Amz-Security-Token",
"Access-Control-Allow-Methods" : "OPTIONS,POST",
"Access-Control-Allow-Credentials" : true,
"Access-Control-Allow-Origin" : "*",
"X-Requested-With" : "*"
},
body: body
};
return response;
};
// https://stackoverflow.com/a/37826698/3221253
function chunks(inputArray, perChunk) {
return inputArray.reduce((all,one,i) => {
const ch = Math.floor(i/perChunk);
all[ch] = [].concat((all[ch]||[]),one);
return all;
}, []);
}
IAM Role
{
"Version": "2012-10-17",
"Statement": [
{
"Sid": "VisualEditor0",
"Effect": "Allow",
"Action": [
"dynamodb:BatchGetItem",
"dynamodb:BatchWriteItem",
"dynamodb:Delete*",
"dynamodb:Get*",
"dynamodb:Scan",
"dynamodb:Query"
],
"Resource": [
"arn:aws:dynamodb:eu-central-1:382762466424:table/LikeRelationship-76mphdcsf5cijbgq5kkcny3xpe-staging",
"arn:aws:dynamodb:eu-central-1:382762466424:table/LikeRelationship-76mphdcsf5cijbgq5kkcny3xpe-staging/index/*"
]
},
{
"Sid": "VisualEditor1",
"Effect": "Allow",
"Action": [
"dynamodb:List*",
"dynamodb:Describe*"
],
"Resource": [
"arn:aws:dynamodb:eu-central-1:382762466424:table/LikeRelationship-76mphdcsf5cijbgq5kkcny3xpe-staging",
"arn:aws:dynamodb:eu-central-1:382762466424:table/LikeRelationship-76mphdcsf5cijbgq5kkcny3xpe-staging/index/*"
]
}
]
}