The following changes have been deployed to both Lighter Core, and the Robinhood Chain instance:

• An order_version parameter can now be specified when modifying an order, with both available SDKs supporting it. This guarantees correct ordering, where the sequencer will reject any version that is not strictly greater than the order's current stored version, returning AppErrInvalidOrderOrderVersion.
• Order events now include order_version
• Trade events now include ask_order_version, bid_order_version

The above remains optional, and existing workflows will not break. Examples on how to use order_version are available here (http) and here (ws)