Hi all, We have a project with prod target with Bundle Identifier com.companyName.X & stage target with Bundle Identifier com.companyName.Y We have implemented Push Notification and added a Notification Service Extension file. To upload the stage build to test flight, we have named the Notification Service Extension bundle identifier as com.companyName.Y.NotificationServiceExtension Now, to upload the stage build to testflight, in require the certificate/provisioning profile for this stage service extension. When I try to create an identifier in the apple developer portal with the App ID com.companyName.Y.NotificationServiceExtension, I get an error saying "An App I'd with identifier 'com.companyName.Y.NotificationServiceExtension' is not available. Please try a different strong" Can anyone tell me what am I doing wrong here? Just FYI, I have an identifier created for the prod version i.e com.companyName.X.NotificationServiceExtension and it can be uploaded properly.