diff -r 490ed8ac84a9 -r 082786891630 src/EditProduct.cpp
--- a/src/EditProduct.cpp	Sun Jun 09 16:12:09 2024 +0200
+++ b/src/EditProduct.cpp	Sun Jun 09 17:00:00 2024 +0200
@@ -512,7 +512,7 @@
     /*
      * At this point, see if we must upgrade the whole water part.
      */
-    if (product->sparge_volume != (product->brew_sparge_est + product->eq_HLT_deadspace)) {
+    if ((product->sparge_volume != (product->brew_sparge_est + product->eq_HLT_deadspace)) && (product->stage < PROD_STAGE_PRIMARY)) {
 	qDebug() << "== Update sparge water supply from" << product->sparge_volume << "to" << (product->brew_sparge_est + product->eq_HLT_deadspace);
 	product->sparge_volume = product->brew_sparge_est + product->eq_HLT_deadspace;
 	is_changed();