diff --git a/barker/barker/routers/voucher/merge_move.py b/barker/barker/routers/voucher/merge_move.py
index c0d144a..4b68898 100644
--- a/barker/barker/routers/voucher/merge_move.py
+++ b/barker/barker/routers/voucher/merge_move.py
@@ -165,7 +165,7 @@ def update_settlements(vouchers: List[uuid.UUID], db: Session):
 
 def check_if_voucher_is_unprinted(voucher_id: uuid.UUID, db: Session) -> None:
     voucher_type: VoucherType = db.query(Voucher.voucher_type).filter(Voucher.id == voucher_id).scalar()
-    if not voucher_type:
+    if voucher_type is None:
         raise HTTPException(
             status_code=status.HTTP_404_NOT_FOUND,
             detail="Original bill not found",
diff --git a/bookie/src/app/sales/bills/bills.component.ts b/bookie/src/app/sales/bills/bills.component.ts
index 776d1b4..58ecf81 100644
--- a/bookie/src/app/sales/bills/bills.component.ts
+++ b/bookie/src/app/sales/bills/bills.component.ts
@@ -220,7 +220,7 @@ export class BillsComponent implements OnInit {
       );
   }
 
-  moveKot(kot: Kot) {
+  moveKot(kot: BillViewItem) {
     const canMergeTables = this.auth.allowed('merge-tables');
     this.chooseTable(canMergeTables)
       .pipe(
@@ -233,9 +233,9 @@ export class BillsComponent implements OnInit {
             return this.bs.moveTable(table);
           }
           if (table.status) {
-            return this.bs.mergeKot(kot.id as string, table);
+            return this.bs.mergeKot(kot.kotId as string, table);
           }
-          return this.bs.moveKot(kot.id as string, table);
+          return this.bs.moveKot(kot.kotId as string, table);
         }),
       )
       .subscribe(