diff --git a/app/Membership/Actions/MembershipStoreAction.php b/app/Membership/Actions/MembershipStoreAction.php
index c2bfd06f..d3097c48 100644
--- a/app/Membership/Actions/MembershipStoreAction.php
+++ b/app/Membership/Actions/MembershipStoreAction.php
@@ -33,7 +33,7 @@ class MembershipStoreAction
 
         $subactivity = $subactivity ?: new Subactivity(['nami_id' => null, 'id' => null]);
 
-        if ($activity->hasNami && ($subactivity->id === null || $subactivity->hasNami)) {
+        if ($this->syncable($member, $activity, $subactivity)) {
             try {
                 $namiId = app(NamiSettings::class)->login()->putMembership($member->nami_id, NamiMembership::from([
                     'startsAt' => $from,
@@ -55,7 +55,7 @@ class MembershipStoreAction
             'nami_id' => $namiId ?? null,
         ]);
 
-        if ($activity->hasNami && ($subactivity->id === null || $subactivity->hasNami)) {
+        if ($this->syncable($member, $activity, $subactivity)) {
             $member->syncVersion();
         }
 
@@ -64,6 +64,11 @@ class MembershipStoreAction
         return $membership;
     }
 
+    protected function syncable(Member $member, Activity $activity, ?Subactivity $subactivity): bool
+    {
+        return $activity->hasNami && ($subactivity->id === null || $subactivity->hasNami) && $member->hasNami;
+    }
+
     /**
      * @return array<string, array<int, string|In>>
      */
diff --git a/tests/Feature/Membership/StoreTest.php b/tests/Feature/Membership/StoreTest.php
index e9031bb1..11a71432 100644
--- a/tests/Feature/Membership/StoreTest.php
+++ b/tests/Feature/Membership/StoreTest.php
@@ -247,6 +247,18 @@ class StoreTest extends TestCase
         ]);
     }
 
+    public function testItStoresNamiActivityAndSubactivityForNonNamiMember(): void
+    {
+        $this->withoutExceptionHandling();
+        $member = Member::factory()->defaults()->create();
+        $activity = Activity::factory()->hasAttached(Subactivity::factory()->inNami(7))->inNami(6)->create();
+
+        $this->post(
+            "/member/{$member->id}/membership",
+            MembershipRequestFactory::new()->in($activity, $activity->subactivities->first())->group($member->group)->create()
+        )->assertOk();
+    }
+
     /**
      * @testWith ["namierror<br>", "namierror&lt;br&gt;"]
      *           ["", "Erstellen der Mitgliedschaft fehlgeschlagen"]