diff -r 78830c2ec792 -r 42b88d85fefc src/EditProduct.cpp
--- a/src/EditProduct.cpp	Mon Jun 06 14:22:18 2022 +0200
+++ b/src/EditProduct.cpp	Mon Jun 06 17:15:27 2022 +0200
@@ -235,7 +235,8 @@
 	product->yeast_prod_date = QDate();
 	product->yeast_pitchrate = product->prop_volume[0] = product->prop_volume[1] = product->prop_volume[2] = product->prop_volume[3] = 0;
 	product->divide_type = product->divide_parts = product->divide_part = 0;
-	product->divide_size = product->divide_factor = 0;
+	product->divide_size = 0;
+	product->divide_factor = 1;
     }
 
     // Tab generic.