1. A method comprising: adding a first attribute to a first data object in a standard repository of data objects, wherein the first data object is identified by a first name; in response to the adding the first attribute to the first data object, adding the first attribute to each data object identified by the first name in a customized repository of data objects; identifying each object, in the customized repository, that comprises an upgrade ancestor field that includes a value of the first name; and in response to the adding the first attribute to the first data object, and in response to the identifying, adding, using a processor, the first attribute to the each data object that comprises an upgrade ancestor field that includes a value of the first name.