diff --git a/AKModel/models.py b/AKModel/models.py
index b645c0c1a218d003afd85a16656ab23f75976e96..895523fdedba2fd2f51a14a6a20cd66cf32e81ab 100644
--- a/AKModel/models.py
+++ b/AKModel/models.py
@@ -826,7 +826,7 @@ class Room(models.Model):
             "time_constraints": time_constraints
         }
 
-        data["fulfilled_room_constraints"].append(f"availability-room-{self.pk}")
+        data["fulfilled_room_constraints"].append(f"fixed-room-{self.pk}")
 
         if not any(constr.startswith("proxy") for constr in data["fulfilled_room_constraints"]):
             data["fulfilled_room_constraints"].append("no-proxy")
@@ -990,7 +990,7 @@ class AKSlot(models.Model):
             data["time_constraints"].extend(category_constraints)
 
         if self.fixed and self.room is not None:
-            data["room_constraints"].append(f"availability-room-{self.room.pk}")
+            data["room_constraints"].append(f"fixed-room-{self.room.pk}")
 
         if not any(constr.startswith("proxy") for constr in data["room_constraints"]):
             data["room_constraints"].append("no-proxy")