Index: lams_central/web/includes/javascript/authoring/authoringGeneral.js
===================================================================
diff -u -r248e47a1f8714d3e57be1e4dc12b4fae4f396cb3 -rb97b1cb641605fec844ccd19ca53a0ac5e53e7e3
--- lams_central/web/includes/javascript/authoring/authoringGeneral.js	(.../authoringGeneral.js)	(revision 248e47a1f8714d3e57be1e4dc12b4fae4f396cb3)
+++ lams_central/web/includes/javascript/authoring/authoringGeneral.js	(.../authoringGeneral.js)	(revision b97b1cb641605fec844ccd19ca53a0ac5e53e7e3)
@@ -2122,7 +2122,8 @@
 				this.orderID = null;
 			}
 			
-			if (this.gradebookToolOutputWeight || this.gradebookToolOutputWeight == 0) {
+			if (this.gradebookToolOutputDefinitionWeightable
+				&& (this.gradebookToolOutputWeight || this.gradebookToolOutputWeight == 0)) {
 				if (weightsSum == null) {
 					weightsSum = 0;
 				}
Index: lams_central/web/includes/javascript/authoring/authoringProperty.js
===================================================================
diff -u -r248e47a1f8714d3e57be1e4dc12b4fae4f396cb3 -rb97b1cb641605fec844ccd19ca53a0ac5e53e7e3
--- lams_central/web/includes/javascript/authoring/authoringProperty.js	(.../authoringProperty.js)	(revision 248e47a1f8714d3e57be1e4dc12b4fae4f396cb3)
+++ lams_central/web/includes/javascript/authoring/authoringProperty.js	(.../authoringProperty.js)	(revision b97b1cb641605fec844ccd19ca53a0ac5e53e7e3)
@@ -719,6 +719,10 @@
 								return false;
 							}
 						});
+					} else {
+						activity.gradebookToolOutputDefinitionDescription = null;
+						activity.gradebookToolOutputDefinitionWeightable = false;
+						activity.gradebookToolOutputDefinitionWeight = null;
 					}
 				}