Adds simple comment as per PR review #14124

Author: roldy

sormas-ui/src/main/java/de/symeda/sormas/ui/therapy/DrugSusceptibilityForm.java

@@ -350,6 +350,9 @@ public void markAsDirty() {
 
 	@Override
 	public void commit() {
+		// When no DrugSusceptibilityDto is bound (e.g. after a disease-section swap nulls it), the internal
+		// field group has no item datasource, so committing its always-bound drug fields would throw
+		// "Property amikacinMic not bound to datasource" (#14124). Nothing to write, so skip the commit.
 		if (getValue() == null) {
 			return;
 		}