ServiceNow Flow Designer does not have a built-in version control system to revert back to previous versions of a flow. However, there are some workarounds you can consider:
1. Manual Version Control: You can manually save versions of your flow by duplicating it at key stages of development. This way, you can revert back to a previous version by using the duplicate.
2. Use Update Sets: You can use update sets to capture changes to a flow. This way, you can revert back to a previous version by reverting the update set.
3. Use Source Control: ServiceNow supports integration with Git-based source control repositories. You can use this feature to manage versions of your flow. However, this requires some setup and may not be suitable for all situations.
4. Use the Revision History: ServiceNow keeps a revision history of all changes made to a record. You can use this feature to view previous versions of a flow. However, this is not a full version control system and may not be suitable for all situations.
5. Use a Custom Solution: You can develop a custom solution to manage versions of your flow. This could involve creating a custom table to store versions of a flow, or using a third-party version control system. However, this requires development effort and may not be suitable for all situations.
Remember, always test any changes in a non-production environment before applying them to your production environment.
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