It says that customerId is deprecated and that customer should be used instead, but there is no customer field available:
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I ran into the same issue. I am just using customerId for now, but it would be great to have this fixed.
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In the next API version (2025-01), there is a new customer input field that allows you to associate a customer by id/email, or create/update a customer.
The messaging is confusing as the new customer input isn’t available on older API versions.
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