To work in Application Lifecycle Management (ALM) 12.55 with projects created in previous Quality Center and ALM versions, you must upgrade your projects to align them with the required configurations of the current version of ALM.
To update multiple projects concurrently, use ALM Robot. For details, see ALM Robot.
Performance Center: To work with projects created in Performance Center versions 9.52 or earlier, you must migrate your projects to align them with the required configurations of ALM. For details, see the Micro Focus Performance Center Installation Guide.