Error: `@defer` label `dup` is not unique within the document
   ╭─[ 0125_defer_duplicate_label.graphql:4:31 ]
   │
 3 │         ... @defer(label: "dup") {
   │                           ──┬──  
   │                             ╰──── label first used here
 4 │             ... @defer(label: "dup") {
   │                               ──┬──  
   │                                 ╰──── duplicate label used here
───╯

