What problem could arise between processing steps if this is not a single transaction?

If processing between steps is not combined into a single transaction, data inconsistency issues may arise. For example, if the first step changes the state, and the second step fails or does not execute, the system will be in an intermediate, inconsistent state.

This can lead to:

• Data loss or partial processing.
• Violation of business logic.
• Difficulties in rolling back changes.

Transactions are used to ensure atomicity — either all steps are successfully completed, or none are applied. If a transaction is not possible, compensation mechanisms or saga patterns are used for coordinated state management.