diff -r a7ce9b8d19d8 -r 8fb922c00a2d www/includes/db_product.php
--- a/www/includes/db_product.php	Thu Aug 27 16:40:51 2020 +0200
+++ b/www/includes/db_product.php	Sat Sep 12 12:15:24 2020 +0200
@@ -1172,6 +1172,16 @@
     }
     syslog(LOG_NOTICE, "inventory_reduce() stage: ".$stage." inventory_reduced: ".$inventory_reduced);
 
+    /* Nothing to reduce yet, but just set the $inventory_reduced */
+    if (($stage >= 1) && ($inventory_reduced < 1)) {
+        $inventory_reduced = 1;
+        $savethis = 1;
+    }
+    if (($stage >= 2) && ($inventory_reduced < 2)) {
+	$inventory_reduced = 2;
+	$savethis = 1;
+    }
+
     /*
      * If the brew is done, reduce the used ingredients.
      */
@@ -1396,6 +1406,11 @@
 	$savethis = 1;
     }
 
+    if (($stage >= 8) && ($inventory_reduced < $stage)) {
+        $inventory_reduced = $stage;
+        $savethis = 1;
+    }
+
     /*
      * Save only if something was reduced.
      */