Once an object has been claimed into a project, you can modify it as needed. Be sure that your create/update scope is set to the project level, find the claimed object, and modify it as necessary using the Update form, a data sheet or data list, load files, or any other method for modifying data in SmartPlant Foundation. The changes you make will apply to the object at the project level, but will not be applied to the object at the plant level until you merge the object back to the plant.
For more information about making changes to an object within a project, see Modifying an object in a project.