Reached dev team, they released the new API changes today, I don’t see any notification prior this release. So far, for my case, I’m using the python data v2 api, so the solution is: upgrade to the latest version >= 1.2.3
But I would callout, this API release is not backward compatible!! which breaks people like me, for a non-financial / experimental API, people may be accept it, but I believe Alpaca is a financial oriented company, such kind of non-professional release shouldn’t be happened. But unfortunately they breaks the users which just by bringing some new fields (I would assume the developers are excited about those new features), which makes me feel the team is not that professional as I expected… I would tag all the APIs are not reliable / backward compatible.
So, for the next step, set the correct expectation: the Alpaca api might be completely break the App suddenly, and make sure the App can be resumed from any point. Or, chose other data APIs, e.g. Polygon.io.