Fix: Use proper comparison

src/Form/TeamerApplicationType.php

@@ -34,7 +34,7 @@ class TeamerApplicationType extends AbstractType
 
                 $assignment = $application->getAssignment();
 
-                if (null === $assignment->getPickup()) {
+                if (0 === (int) $assignment->getPickup()) {
                     return;
                 }