diff --git a/journals/models.py b/journals/models.py
index 6616ccf..cfd4cda 100755
--- a/journals/models.py
+++ b/journals/models.py
@@ -34,8 +34,8 @@ class TeacherJ(models.Model):
     student = models.ForeignKey(User, verbose_name=u'Студент', related_name=u'teacherJ_student', null=True, blank=True)
     full = models.BooleanField(verbose_name=u'Журнал создан', default=False)
     course = models.ForeignKey(Course, verbose_name=u'Курс')
-    homework = models.ForeignKey(Homework, verbose_name=u'ДЗ', blank=True, null=True)
-    lesson = models.ForeignKey(Lesson, verbose_name=u'Урок', blank=True, null=True)
+    homework = models.ForeignKey(Homework, verbose_name=u'ДЗ', blank=True, null=True, on_delete=None)
+    lesson = models.ForeignKey(Lesson, verbose_name=u'Урок', blank=True, null=True, on_delete=None)
     progress = models.IntegerField(verbose_name=u'Прогресс', default=0)
     current_token = models.CharField(verbose_name=u'Текущий ключ', blank=True, default='', max_length=100)
     teacher = models.ForeignKey(User, verbose_name=u'Преподаватель', related_name=u'teacherJ_teacher', blank=True,
@@ -246,7 +246,7 @@ class CourseThemeJ(models.Model):
     material = models.ForeignKey(CourseTheme, verbose_name=u'Тема')
     date = models.DateTimeField(verbose_name=u'Дата начала', blank=True, null=True)
     f_date = models.DateTimeField(verbose_name=u'Дата завершения', blank=True, null=True)
-    actual_lesson = models.ForeignKey(Lesson, verbose_name=u'Актуальны урок для этой темы', blank=True, null=True)
+    actual_lesson = models.ForeignKey(Lesson, verbose_name=u'Актуальны урок для этой темы', blank=True, null=True, on_delete=None)
 
     def __unicode__(self):
         return u'%s: %s %s' % (self.id, self.material, self.student)