Field created in an Installed Application(sys_store_app) will have the column name with prefix 'u_' not 'x_'SummarySometimes users may have Scoped Applications to create fields, they achieve it by having catalog items in the application. If a user submits the catalog item, it triggers dictionary creation(maybe using workflows) on a table within the application scope. In this approach, Though the fields are created without any issues the prefix of the field name will differ based on the mode of Scoped Application in the instance. If it is a sys_app(Development mode), the fields can be added to the scope by the original authors and don't need to be segregated as "custom". Hence, the field name has the prefix with scope. i.e., x_.If it is a sys_store_app(Installed mode), any net new columns are added, even if they are in the scope but are not coming from the original application package. Therefore these fields are considered as "custom". Hence, the field name is prefixed with 'u_'.Related LinksThis is the desired behavior of the system to segregate local and custom fields in a Scoped App.