On 28 September 2023 we are making a mandatory change to our REST API.
The exchange will reject any request for amend qty up on an already filled GTC/DAY order with the text “Invalid orderID”
The change is already accessible in Testnet and will be live in Production from 28 September 2023, at 04:00 UTC.
For more details on the change please read this announcement:
REST API Update: Rejecting qty amend up on already filled GTC/DAY orders