diff --git a/spec/set-payload.schema.json b/spec/set-payload.schema.json
index 5cf45c2dcea98f0ed88ebe8fb2365a6033f49343..400a28c4218d82a0bfa263f13489be16fcad95a1 100644
--- a/spec/set-payload.schema.json
+++ b/spec/set-payload.schema.json
@@ -27,7 +27,7 @@
     "sub": {
       "description": "Beschreibt, wen das SET betrifft.",
       "type": "string",
-      "pattern": "^(case|submission|reply):[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$"
+      "pattern": "^(submission|reply):[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$"
     },
     "txn": {
       "description": "Der Transaction Identifier ('txn') enthält 'case:' und die UUID des Cases.",