U4-8569 - Saving a member type changes the UniqueId of custom properties and tabs

Created by Sebastiaan Janssen 07 Jun 2016, 10:05:42 Updated by Shannon Deminick 20 Jun 2016, 09:19:10

When you save a member type after changing properties on the member type, all of the custom properties for that membertype in the CmsPropertyType table get a different UniqueId.

This is a problem for Courier because Courier is built to match up the UniqueId field between two environments. If the UniqueId field for the property matches the UniqueId on the other end then it must be the same property. But, because the UniqueId changes on either environment, it cannot make a match any more. This results in severe data loss, when Courier transfers a property on the membertype to the next environment, it deletes any existing data for that custom property due to the UniqueId problem.

This issue affects users of Umbraco who deploy their member types using Courier or Umbraco as a Service. This issue may also affect third party plugins / packages that attempt to transfer member types using the UniqueId (we're not aware of packages that do this).

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