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No downtime is expected for the Jira instance. For some upgrades, there may be downtime for the R4J easeRequirements application.
If there are additional steps required after the upgrade, they must be executed to avoid unexpected errors in the application.
Installation
Download the installation file provided.
Go to Manage apps.
Uninstall
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easeRequirements and Coverage services.
Click on Upload app > Choose file and select the installation file in the file explorer.
Click on Upload.