I'm having the same issue:
[BUYA8BA234/com.bymilesltd.ByMiles:1272759664]: Failed to set IXProgressHint on the coordinator: Error Domain=IXErrorDomain Code=5 "A coordinated app install already exists for [com.********/Invalid/[system-defined]] with intent IXCoordinatorIntentUpdating (creator App Store) but request by appstoreagent (pid 1665) was for intent IXCoordinatorIntentInitiating" UserInfo={NSLocalizedFailureReason=Coordinated install exists with different intent., FunctionName=-[IXSClientConnection _remote_createAppInstallCoordinatorWithSeed:createIfNotExisting:requireMatchingIntent:scopeRequirement:completion:], SourceFileLine=641, NSLocalizedDescription=A coordinated app install already exists for [com.*******/Invalid/[system-defined]] with intent IXCoordinatorIntentUpdating (creator App Store) but request by appstoreagent (pid 1665) was for intent IXCoordinatorIntentInitiating}
Topic:
App Store Distribution & Marketing
SubTopic:
TestFlight