Starting with API version 2025-10 of the GraphQL Storefront API, we have introduced the SELLING_PLAN_NOT_APPLICABLE_ON_COMPANY_LOCATION warning code to the CartWarningCode enum. This warning code is triggered when a logged in B2B customer creates a cart with a selling plan or adds a merchandise item with a selling plan to their cart.
This is a companion discussion topic for the original entry at https://shopify.dev/changelog/sellingplannotapplicableoncompanylocation-warning-code-for-storefront-api