#vulnerable code 
                             DbAction.Insert<?> createDeepInsert(String propertyName, Object value, Object key,
			@Nullable DbAction.Insert<?> parentInsert) {

		PersistentPropertyPath<RelationalPersistentProperty> propertyPath = toPath(parentInsert.getPropertyPath().toDotPath() + "." + propertyName);
		DbAction.Insert<Object> insert = new DbAction.Insert<>(value, propertyPath, parentInsert);
		insert.getQualifiers().put(propertyPath, key);
		return insert;
	} 
                            #location 4 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                             DbAction.Insert<?> createInsert(String propertyName, Object value, @Nullable Object key) {

		DbAction.Insert<Object> insert = new DbAction.Insert<>(value,
				context.getPersistentPropertyPath(propertyName, DummyEntity.class), rootInsert);
		insert.getQualifiers().put(toPath(propertyName), key);

		return insert;
	}