(generative-ai-cdk-constructs): KnowledgeBase construct cannot create vector store

[InitialXW]

Describe the bug

the below code returns error and the knowledge base (and the underlying vector store) cannot be created

this.knowledgeBase = new bedrock.KnowledgeBase(this, 'BedrockKnowledgeBase', {
embeddingsModel: bedrock.BedrockFoundationModel.TITAN_EMBED_TEXT_V1,
instruction: Use this knowledge base answer questions.,
});

error response: Received response status [FAILED] from custom resource. Message returned: Er
ror: An error occurred (ValidationException) when calling the CreateKnowledg
eBase operation: The knowledge base storage configuration provided is invali
d... The OpenSearch Serverless engine type associated with your vector index
is invalid. Recreate your vector index with one of the following valid engin
e types: FAISS. Then retry your request.

Expected Behavior

knowledge base is created and a default new serverless OpenSearch collection is created alongside

Current Behavior

reports error and resources cannot be created (Testing using us-west-2), the same code worked perfectly about 1 week ago

Reproduction Steps

import * as cdk from 'aws-cdk-lib';
import { bedrock } from '@cdklabs/generative-ai-cdk-constructs';
import { Construct } from 'constructs';

export interface KbStatefulProps extends cdk.StackProps {
}

export class KbStatefulStack extends cdk.Stack {

public readonly knowledgeBase: bedrock.KnowledgeBase

constructor(scope: Construct, id: string, props: KbStatefulProps) {
super(scope, id, props);

this.knowledgeBase = new bedrock.KnowledgeBase(this, 'BedrockKnowledgeBase', {
  embeddingsModel: bedrock.BedrockFoundationModel.TITAN_EMBED_TEXT_V1,
  instruction: `Use this knowledge base answer questions `,
});

}
}

Possible Solution

No response

Additional Information/Context

No response

CDK CLI Version

2.134.0

Framework Version

0.1.105

Node.js Version

v20.12.0

OS

Ubuntu 22.04

Language

Typescript

Language Version

No response

Region experiencing the issue

us-west-2

Code modification

no

Other information

No response

Service quota

• I have reviewed the service quotas for this construct