diff --git a/.gitignore b/.gitignore
index 5ba6a53..1e51223 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1 @@
-data/db.sqlite3
+data/*.sqlite3*
diff --git a/app/base/models/booking.py b/app/base/models/booking.py
index 4527ef7..b6a86fe 100755
--- a/app/base/models/booking.py
+++ b/app/base/models/booking.py
@@ -11,7 +11,7 @@ if TYPE_CHECKING:
     from django.db.models import OuterRef
     from app.base.models.person import Person
     from app.base.models.booking_type import BookingType
-    from datetime import timedelta
+    from datetime import timedelta  # noqa F401
 
 
 class Booking(models.Model):
diff --git a/app/base/views/trigger/toggle_checkin.py b/app/base/views/trigger/toggle_checkin.py
index 41d1ee7..2b5a8ef 100755
--- a/app/base/views/trigger/toggle_checkin.py
+++ b/app/base/views/trigger/toggle_checkin.py
@@ -1,3 +1,4 @@
+from datetime import timedelta
 from django.contrib.auth.mixins import LoginRequiredMixin
 from django.shortcuts import redirect
 from django.utils import timezone
@@ -11,17 +12,17 @@ class ToggleCheckinView(LoginRequiredMixin, View):
         user = Person.objects.get(id=kwargs['user_id'])
         next = self.request.GET.get('next')
         booking = user.current_checkin  # performs db query
+        now = timezone.now()
+        now -= timedelta(microseconds=now.microsecond)  # remove precision
 
         if booking:
-            booking.end_time = timezone.now()
+            booking.end_time = now
             booking.save()
         else:
             plan = self.request.GET.get('plan')
             # get() throws exception if not-exist. This is intended behavior!
             # If you need `None` instead, use `filter().first()`
             book_type = BookingType.objects.get(key=plan)
-            Booking.objects.create(
-                user=user, type=book_type, begin_time=timezone.now()
-            )
+            Booking.objects.create(user=user, type=book_type, begin_time=now)
 
         return redirect(next)