diff --git a/wgmaster/migrate.py b/wgmaster/migrate.py
index 0737c97..af1facd 100755
--- a/wgmaster/migrate.py
+++ b/wgmaster/migrate.py
@@ -1350,7 +1350,7 @@ def migrate_deliveries(in_dir: str, out_dir: str) -> None:
                 if waage:
                     waage = re.split(r' +', waage)
                     scale_id = waage[1]
-                    weighing_id = waage[3]
+                    weighing_id = f'{date}/{waage[3]}'
 
                 comment: Optional[str] = d['Anmerkung']
                 acid = d['Säure']