https://docs.servicenow.com/bundle/tokyo-application-development/page/script/server-scripting/concept/c_Serve

Configuring the label of a field in a child table changes the label only on that table, not on the base table or the parent table. The base table is the table that contains the common fields for all the extended tables, and the parent table is the table that is directly extended by the child table. The label of a field on the base table or the parent table can be different from the label on the child table. Reference: [ServiceNow Docs - Table extension], [ServiceNow Community - How to change field label in child table]

The source control operation used to store local changes on an instance for later application is called a stash. A stash is a temporary storage area for uncommitted changes that are not ready to be pushed to a remote repository. Developers can use stashes to save their work in progress without committing it to the local repository or discarding it. Stashes can be applied later to restore the changes to the working directory, or dropped if they are no longer needed. Reference: [ServiceNow Docs - Stash local changes], [ServiceNow Docs - Source control]