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Ross GoldbergRoss Goldberg 

Unable to removed tabs from Lightning App that is managed

In Winter '17 we are able to include in a managed pacakge a "Lightning App" that pre-defines tabs to include.  From the Lightning App Manager in a subscriber org (where the package is installed) if we edit the app it allows us to remove "Selected Items", but when we go to save the changes we receive the following error:

An error occurred while trying to update the record. Please try again. Cannot modify managed object: entity=TabSetMember, component=null, state=MANAGED_INSTALLED - tab

Is this a platform bug or simply, a limitation, or not yet a supported action?

Ross GoldbergRoss Goldberg
FYI, we get the same error if we attempt to change the "Selected Profiles" associated with a managed LIghtning App
Ross GoldbergRoss Goldberg
Hannah LernerHannah Lerner
I just got the exact same error when trying to reorder tabs in a Lightning app. Not sure why this is
got the same error and just opened a ticket with Salesforce support. 
Carlos Ramirez Martinez-EiroaCarlos Ramirez Martinez-Eiroa
@BoonPlus Was support able to resolve your issue? Could you post the ticket # to be able to reference it when we contact them?
Just talked to a Sr. Director Product Management today, the managed app items are meant to be locked down in Lightning, Salesforce is developing a new feature which will allows the end user to "Append" item to the managed app, it'll be a different object to store the appended items. We can workaround the current restriction by using medadata api, but I was told today it will be blocked.