Quick Info :

• We have “Deployment Pipelines” in PowerBI which is the best way to use Workspace and content of power bi as Test Dev and PROD. More Info: https://docs.microsoft.com/en-us/power-bi/create-reports/deployment-pipelines-overview
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• Currently, Deployment Pipeline has a Limitation where you cannot add/change the Pipeline assigned to the workspace if the user has not been given the rights on the pipeline.
• You should have Administrator Rights to run the Rest API for that workspace and azure directory ( Basically a Power BI Admin)

Problem :

• Someone assigned the Workspace to his/her pipeline and left the organization.
• Did not add any other user/group to access the pipeline as per the recommendations.
• There is no way you can Assign yourself or your group to Pipeline and fix it.