diff --git a/brewman/brewman/models/voucher.py b/brewman/brewman/models/voucher.py
index 55130cdf..f0d90a86 100644
--- a/brewman/brewman/models/voucher.py
+++ b/brewman/brewman/models/voucher.py
@@ -315,6 +315,7 @@ class Inventory(Base):
             self.product_id = product_id
         else:
             self.product = product
+            self.product_id = product.id
         if batch is None:
             self.batch_id = batch_id
         else:
diff --git a/brewman/brewman/routers/fingerprint.py b/brewman/brewman/routers/fingerprint.py
index c83dd318..c4da18b6 100644
--- a/brewman/brewman/routers/fingerprint.py
+++ b/brewman/brewman/routers/fingerprint.py
@@ -86,6 +86,7 @@ def read_file(input_file: UploadFile):
     else:
         encoding = "ascii"
         # raise ValidationError("The encoding of the attendance file is not correct")
+    input_file.file.close()
     return StringIO(output.decode(encoding))