Creating Knowledge Base Error: Replacement "" for multi-value placeholder "foundationModelId" was empty or contained a wildcard character

More often than not, when creating a new Bedrock Knowledge Base in the console, I get the following error upon submitting "Create knowledge base".

undefined There were problems with the supplied replacements: [Replacement "" for multi-value placeholder "foundationModelId" was empty or contained a wildcard character]

• This occurs when selecting any embedding model and throws the same error
• I've tried using the "Quick create a new vector datastore" as well as using a vector Collection on OpenSearch via "Choose a vector store you have created"
• I noticed a new vector Collection is always created when submitting "Create knowledge base" and then the error throws, so it's possible to reuse that newly created Collection vector db. The same error will throw even when reusing the Collection.

UPDATE | So creating a brand new Role in the console Create Knowledge Base flow, unblocks this issue. However, when I compare the two roles - the old, updated one I was trying to reuse mentioned in comment below and the brand new role created - the old, updated role is a superset of the new role. So all the permissions created in the new role are indeed in the old, updated role. So I don't understand why the old, updated role would be the issue, but apparently it is.

Old Role Policy: AmazonBedrockFoundationModelPolicyForKnowledgeBase_oldrole

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "BedrockInvokeModelStatement",
            "Effect": "Allow",
            "Action": [
                "bedrock:InvokeModel"
            ],
            "Resource": [
                "arn:aws:bedrock:us-east-1::foundation-model/amazon.titan-embed-text-v2:0"
            ]
        }
    ]
}

New Role Policy: AmazonBedrockFoundationModelPolicyForKnowledgeBase_newrole

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "BedrockInvokeModelStatement",
            "Effect": "Allow",
            "Action": [
                "bedrock:InvokeModel"
            ],
            "Resource": [
                "arn:aws:bedrock:us-east-1::foundation-model/amazon.titan-embed-text-v2:0"
            ]
        }
    ]
}

---

Old Role (i updated with new collection ARN I used in Create Knowledge Base console workflow) Policy: AmazonBedrockOSSPolicyForKnowledgeBase_oldrole

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "OpenSearchServerlessAPIAccessAllStatement",
            "Effect": "Allow",
            "Action": [
                "aoss:APIAccessAll"
            ],
            "Resource": [
                "arn:aws:aoss:us-east-1:account:collection/oldcollection",
                "arn:aws:aoss:us-east-1:account:collection/newcollection"
            ]
        }
    ]
}

New Role Policy: AmazonBedrockOSSPolicyForKnowledgeBase_newrole

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "OpenSearchServerlessAPIAccessAllStatement",
            "Effect": "Allow",
            "Action": [
                "aoss:APIAccessAll"
            ],
            "Resource": [
                "arn:aws:aoss:us-east-1:account:collection/newcollection"
            ]
        }
    ]
}