diff --git a/aleksis/apps/alsijil/frontend/components/coursebook/statistics/StatisticsForGroupTab.vue b/aleksis/apps/alsijil/frontend/components/coursebook/statistics/StatisticsForGroupTab.vue
index 980bf03b1c172a048891457063c8bee5f106de69..c318676b1bc9643b261c703ed0db14469d4123f6 100644
--- a/aleksis/apps/alsijil/frontend/components/coursebook/statistics/StatisticsForGroupTab.vue
+++ b/aleksis/apps/alsijil/frontend/components/coursebook/statistics/StatisticsForGroupTab.vue
@@ -10,11 +10,6 @@
     :show-select="false"
     @items="items = $event"
   >
-    <!--    <template #header.person="header">-->
-    <!--      Hello world-->
-    <!--      {{ header }}-->
-    <!--    </template>-->
-
     <template
       v-for="(extraMark, index) in extraMarks"
       #[`extraMarks.${index}.count`]="{ item }"
diff --git a/aleksis/apps/alsijil/frontend/components/coursebook/statistics/StatisticsForPersonPage.vue b/aleksis/apps/alsijil/frontend/components/coursebook/statistics/StatisticsForPersonPage.vue
index 3303591f71f851bc65bdadc1244c6dd22c6bc029..9dddbaa84a2a04959107636c52f85489776149eb 100644
--- a/aleksis/apps/alsijil/frontend/components/coursebook/statistics/StatisticsForPersonPage.vue
+++ b/aleksis/apps/alsijil/frontend/components/coursebook/statistics/StatisticsForPersonPage.vue
@@ -73,6 +73,7 @@
                 <!-- teacher -->
                 <person-chip
                   v-for="teacher in item.relatedDocumentation.teachers"
+                  :key="teacher.id"
                   :person="teacher"
                   no-link
                   small
diff --git a/aleksis/apps/alsijil/schema/statistics.py b/aleksis/apps/alsijil/schema/statistics.py
index 51ba12b379fb1ec83b6b944b5961e8b9c991dd46..091afdae8b705d660413fe53b6b35328459a16cb 100644
--- a/aleksis/apps/alsijil/schema/statistics.py
+++ b/aleksis/apps/alsijil/schema/statistics.py
@@ -1,4 +1,3 @@
-
 import graphene
 
 from aleksis.apps.kolego.models.absence import AbsenceReason