Contract keys not supported in Daml Studio?

Questions
1

I am learning Daml in Daml studio (VS Code) and getting an error message when I hover over a template that uses contract keys:

Failure to process Daml program, this feature is not currently supported.
Contract keys.

template CustomerTokenBalance
  with
    customer : Party
    tokenId : Text
    balance : Decimal
  where
    signatory customer
    key (customer, tokenId) : (Party, Text)
    maintainer key._1

Should I not use contract keys or is there a fix?

2

I switched to sdk-version: 2.10.0 and keys seem to be supported.

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3

Switching to 2.10.0 resolved this because Contract Keys is not supported in 3.x. This allows 3.x to support multiple domains, which is important for supporting the long-term development of the Canton Network. Contract Keys will remain supported by the LTS releases of 2.x.

It is possible that something resembling keys may be included in a future version of 3.x; however, the uniqueness guarantees provided by the feature in 2.x are fundamentally incompatible with the improved distributed ledger features that underpin Canton in 3.x.

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