dbt model contracts enforce that the column names, data types, and number of columns defined in the contract exactly match the columns produced by the compiled SQL. If any column appears in one location (the contract or the SQL) but not in the other, dbt raises an enforcement error.

In this scenario, the error message shows:

ORDER_ID is missing in the model definition, meaning the SQL no longer contains a column named order_id, but the contract still expects it.

ORDER_KEY is missing in the contract, meaning the model SQL now contains a new column, but this column has not been added to the contract.

To fix the mismatch, you must remove columns from the contract that no longer exist in the SQL and add to the contract any new columns that now appear in the SQL.

Therefore:

Option A — Remove order_id from the contract — is correct because the column no longer exists in the model SQL.

Option D — Add order_key to the contract — is correct because the SQL now produces this column.

Options B and C incorrectly alter the wrong side of the definition, and Option E would create a mismatch in the opposite direction.

Thus, the correct fixes are A and D.