Adding DynamoDB GlobalSecondaryIndex via CDK both requires AND disallows specify ReadCapacityUnits/WriteCapacityUnits

Question

I'm trying to add a Global Secondary Index to an existing DynamoDB table that is defined thusly in the CDK:

```
const itemsTable = new Table(this, config.DYNAMODB_ID, {
            tableName: config.DYNAMODB_ID,
            partitionKey: { name: 'itemGuid', type: AttributeType.STRING },
            billingMode: BillingMode.PAY_PER_REQUEST,
            removalPolicy: RemovalPolicy.RETAIN,
            pointInTimeRecovery: true,
            deletionProtection: true,
        });

itemsTable.addGlobalSecondaryIndex({
            indexName: 'ItemsByType',
            partitionKey: { name: 'type', type: AttributeType.STRING },
            projectionType: ProjectionType.KEYS_ONLY,
        });
```

And I get an error as follows:

```
Resource handler returned message: "One or more parameter values were invalid: Both ReadCapacityUnits and WriteCapacityUnits must be specified for index: ItemsByType"
```

This despite the fact that the table is PAY_PER_REQUEST and according to the documentation I *cannot* specify these values, and if I do this:

```
assetTable.addGlobalSecondaryIndex({
            indexName: 'AssetsByType',
            partitionKey: { name: 'type', type: AttributeType.STRING },
            projectionType: ProjectionType.KEYS_ONLY,
            readCapacity: 5,
            writeCapacity: 5,
        });
```

I instead get this error:

```
Error: you cannot provision read and write capacity for a table with PAY_PER_REQUEST billing mode
```

Accepted Answer

Never mind - apparently the issue here was that exactly one of our lower environments was somehow set to Provisioned at some point and this isn't apparently changed by CDK deploys. Once I manually changed that, it worked.

Adding DynamoDB GlobalSecondaryIndex via CDK both requires AND disallows specify ReadCapacityUnits/WriteCapacityUnits

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