We've updated how subscription contracts are queried to improve clarity and consistency. Previously, the id filter accepted revision IDs of a contract. Now, the id filter only accepts the contract ID of the contract. This applies when using the SubscriptionContracts query in API versions 2025-10 and later. Behavior remains unchanged in previous API versions.
This is a companion discussion topic for the original entry at https://shopify.dev/changelog/changes-to-id-filter-parameter-for-subscription-contracts-query