550006: Dataset schema change not forward compatible

Dataset schema updates must be forward compatible to avoid breaking downstream consumers. Only additive changes are allowed.

• You tried to remove one or more existing fields from the dataset schema.
• You tried to modify the type or structure of an existing field.

• Make only additive schema changes, such as adding new fields or properties.
• If you need a non-additive change, create a new dataset with the desired schema instead of modifying the existing one.