diff --git a/src/main/java/seedu/address/storage/assignment/JsonSerializablePredefinedAssignmentData.java b/src/main/java/seedu/address/storage/assignment/JsonSerializablePredefinedAssignmentData.java
index 9d671715195..ce0ea8c2551 100644
--- a/src/main/java/seedu/address/storage/assignment/JsonSerializablePredefinedAssignmentData.java
+++ b/src/main/java/seedu/address/storage/assignment/JsonSerializablePredefinedAssignmentData.java
@@ -50,7 +50,7 @@ public PredefinedAssignmentsData toModelType() throws IllegalValueException {
     }
 
     private boolean isFieldNull(JsonAdaptedPredefinedAssignment assignment) {
-        return assignment.getName() == null && assignment.getMaxScore() == null;
+        return assignment.getName() == null || assignment.getMaxScore() == null;
     }
 
     @Override