diff --git a/seminar/migrations/0099_auto_20210916_1509.py b/seminar/migrations/0099_auto_20210916_1509.py
new file mode 100644
index 00000000..95043d96
--- /dev/null
+++ b/seminar/migrations/0099_auto_20210916_1509.py
@@ -0,0 +1,43 @@
+# Generated by Django 2.2.24 on 2021-09-16 13:09
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+def force_osoby(apps, schema_editor):
+    typy_osob = [
+        'Resitel',
+        'Organizator'
+    ]
+    for typ in typy_osob:
+        model = apps.get_model('seminar', typ)
+        pocet = model.objects.filter(osoba=None).count()
+        if pocet > 0:
+            # myslím, že je nejde nijak pořádně identifikovat
+            raise ValueError(str(pocet) + " " + typ + "ů nemá osobu")
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ('seminar', '0001_squashed_0098_auto_20210906_0305'),
+    ]
+
+    operations = [
+        migrations.RunPython(force_osoby, migrations.RunPython.noop),
+        migrations.AlterField(
+            model_name='organizator',
+            name='osoba',
+            field=models.OneToOneField(
+                help_text='osobní údaje organizátora',
+                on_delete=django.db.models.deletion.PROTECT,
+                related_name='org', to='seminar.Osoba',
+                verbose_name='osoba'),
+        ),
+        migrations.AlterField(
+            model_name='resitel',
+            name='osoba',
+            field=models.OneToOneField(
+                on_delete=django.db.models.deletion.PROTECT,
+                to='seminar.Osoba', verbose_name='osoba'),
+        ),
+    ]
diff --git a/seminar/models.py b/seminar/models.py
index fdd4de38..ff10348c 100644
--- a/seminar/models.py
+++ b/seminar/models.py
@@ -250,8 +250,8 @@ class Resitel(SeminarModelBase):
 	# Interní ID
 	id = models.AutoField(primary_key = True)
 
-	osoba = models.OneToOneField(Osoba, blank=False, null=True, verbose_name='osoba',
-		on_delete=models.SET_NULL) # FIXME opravit po prvni migraci
+	osoba = models.OneToOneField(Osoba, blank=False, null=False, verbose_name='osoba',
+		on_delete=models.PROTECT)
 	
 
 	skola = models.ForeignKey(Skola, blank=True, null=True, verbose_name='škola',
@@ -704,8 +704,8 @@ class Organizator(SeminarModelBase):
 # zmena dedicnosti z models.Model na SeminarModelBase, potencialni vznik bugu
 
 	osoba = models.OneToOneField(Osoba, verbose_name='osoba', related_name='org',
-		help_text='osobní údaje organizátora', null=True, blank=False,
-		on_delete=models.SET_NULL) #FIXME opravit po migraci
+		help_text='osobní údaje organizátora', null=False, blank=False,
+		on_delete=models.PROTECT)
 
 	vytvoreno = models.DateTimeField(
 		'Vytvořeno',