Workflow schemes are inactive by default after they are created. This means there are no projects in JIRA using the workflow scheme. To activate a workflow scheme, you need to select the scheme and apply it to the project.
When assigning a workflow scheme to a project, you need to follow the three basic steps:
On the confirmation page, depending on the differences between the current and new workflow, you will be prompted to make migration decisions for existing issues. For example, if the current workflow has a status called Resolved and the new workflow does not (or it has something equivalent but with a different ID), you need to specify the new status to place the issues that are currently in the Resolved status. Once mapped, JIRA will start migrating existing issues to the new status:
Once the migration starts, JIRA will display a progress bar showing you the progress. Depending on the number of issues that need to be migrated, this process may take some time. It is recommended to allocate a time frame to perform this task as it can be quite resource-intensive for large instances.