diff --git a/CHANGELOG.md b/CHANGELOG.md
index da1e32cbb..4923eb877 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,8 @@ and this project adheres to
 ## Unreleased
 
 <!-- write down unreleased development here -->
+* [person] add validator for accompanying period with a test on social issues (https://gitlab.com/champs-libres/departement-de-la-vendee/accent-suivi-developpement/-/issues/76)
+* [activity] fix visibility for location
 
 ## Test releases
 
diff --git a/src/Bundle/ChillActivityBundle/Entity/ActivityType.php b/src/Bundle/ChillActivityBundle/Entity/ActivityType.php
index f0e412a8c..5ad692bf4 100644
--- a/src/Bundle/ChillActivityBundle/Entity/ActivityType.php
+++ b/src/Bundle/ChillActivityBundle/Entity/ActivityType.php
@@ -163,16 +163,6 @@ class ActivityType
      */
     private int $personVisible = self::FIELD_REQUIRED;
 
-    /**
-     * @ORM\Column(type="string", nullable=false, options={"default": ""})
-     */
-    private string $placeLabel = '';
-
-    /**
-     * @ORM\Column(type="smallint", nullable=false, options={"default": 1})
-     */
-    private int $placeVisible = self::FIELD_OPTIONAL;
-
     /**
      * @ORM\Column(type="string", nullable=false, options={"default": ""})
      */
@@ -406,16 +396,6 @@ class ActivityType
         return $this->personVisible;
     }
 
-    public function getPlaceLabel(): string
-    {
-        return $this->placeLabel;
-    }
-
-    public function getPlaceVisible(): int
-    {
-        return $this->placeVisible;
-    }
-
     public function getReasonsLabel(): string
     {
         return $this->reasonsLabel;
@@ -688,20 +668,6 @@ class ActivityType
         return $this;
     }
 
-    public function setPlaceLabel(string $placeLabel): self
-    {
-        $this->placeLabel = $placeLabel;
-
-        return $this;
-    }
-
-    public function setPlaceVisible(int $placeVisible): self
-    {
-        $this->placeVisible = $placeVisible;
-
-        return $this;
-    }
-
     public function setReasonsLabel(string $reasonsLabel): self
     {
         $this->reasonsLabel = $reasonsLabel;
diff --git a/src/Bundle/ChillActivityBundle/Form/ActivityType.php b/src/Bundle/ChillActivityBundle/Form/ActivityType.php
index 7ed80ab00..8578b0a8a 100644
--- a/src/Bundle/ChillActivityBundle/Form/ActivityType.php
+++ b/src/Bundle/ChillActivityBundle/Form/ActivityType.php
@@ -143,7 +143,7 @@ class ActivityType extends AbstractType
 
                         return array_map(
                             fn (string $id): ?SocialIssue => $this->om->getRepository(SocialIssue::class)->findOneBy(['id' => (int) $id]),
-                            explode(',', (string) $socialIssuesAsString)
+                            explode(',', $socialIssuesAsString)
                         );
                     }
                 ));
@@ -169,7 +169,7 @@ class ActivityType extends AbstractType
 
                         return array_map(
                             fn (string $id): ?SocialAction => $this->om->getRepository(SocialAction::class)->findOneBy(['id' => (int) $id]),
-                            explode(',', (string) $socialActionsAsString)
+                            explode(',', $socialActionsAsString)
                         );
                     }
                 ));
@@ -260,6 +260,10 @@ class ActivityType extends AbstractType
                         return implode(',', $personIds);
                     },
                     function (?string $personsAsString): array {
+                        if (null === $personsAsString) {
+                            return [];
+                        }
+
                         return array_map(
                             fn (string $id): ?Person => $this->om->getRepository(Person::class)->findOneBy(['id' => (int) $id]),
                             explode(',', (string) $personsAsString)
@@ -282,6 +286,10 @@ class ActivityType extends AbstractType
                         return implode(',', $thirdpartyIds);
                     },
                     function (?string $thirdpartyAsString): array {
+                        if (null === $thirdpartyAsString) {
+                            return [];
+                        }
+
                         return array_map(
                             fn (string $id): ?ThirdParty => $this->om->getRepository(ThirdParty::class)->findOneBy(['id' => (int) $id]),
                             explode(',', (string) $thirdpartyAsString)
@@ -315,6 +323,10 @@ class ActivityType extends AbstractType
                         return implode(',', $userIds);
                     },
                     function (?string $usersAsString): array {
+                        if (null === $usersAsString) {
+                            return [];
+                        }
+
                         return array_map(
                             fn (string $id): ?User => $this->om->getRepository(User::class)->findOneBy(['id' => (int) $id]),
                             explode(',', (string) $usersAsString)
diff --git a/src/Bundle/ChillActivityBundle/Form/ActivityTypeType.php b/src/Bundle/ChillActivityBundle/Form/ActivityTypeType.php
index 26148c340..28947d72b 100644
--- a/src/Bundle/ChillActivityBundle/Form/ActivityTypeType.php
+++ b/src/Bundle/ChillActivityBundle/Form/ActivityTypeType.php
@@ -55,7 +55,7 @@ class ActivityTypeType extends AbstractType
             ]);
 
         $fields = [
-            'persons', 'user', 'date', 'place', 'persons',
+            'persons', 'user', 'date', 'location', 'persons',
             'thirdParties', 'durationTime', 'travelTime', 'attendee',
             'reasons', 'comment', 'sentReceived', 'documents',
             'emergency', 'socialIssues', 'socialActions', 'users',
diff --git a/src/Bundle/ChillActivityBundle/Repository/ActivityRepository.php b/src/Bundle/ChillActivityBundle/Repository/ActivityRepository.php
index 1493a45ae..ebdc0a3c8 100644
--- a/src/Bundle/ChillActivityBundle/Repository/ActivityRepository.php
+++ b/src/Bundle/ChillActivityBundle/Repository/ActivityRepository.php
@@ -31,6 +31,7 @@ class ActivityRepository extends ServiceEntityRepository
     }
 
     /**
+     * @deprecated use @link{ActivityACLAwareRepositoryInterface::findByAccompanyingPeriod}
      * @return Activity[]
      */
     public function findByAccompanyingPeriod(AccompanyingPeriod $period, array $scopes, ?bool $allowNullScope = false, ?int $limit = 100, ?int $offset = 0, array $orderBy = ['date' => 'desc']): array
diff --git a/src/Bundle/ChillActivityBundle/migrations/Version20211207152023.php b/src/Bundle/ChillActivityBundle/migrations/Version20211207152023.php
new file mode 100644
index 000000000..034fee71a
--- /dev/null
+++ b/src/Bundle/ChillActivityBundle/migrations/Version20211207152023.php
@@ -0,0 +1,34 @@
+<?php
+
+/**
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Chill\Migrations\Activity;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20211207152023 extends AbstractMigration
+{
+    public function down(Schema $schema): void
+    {
+        $this->throwIrreversibleMigrationException('placevisible and placelabel could not be created');
+    }
+
+    public function getDescription(): string
+    {
+        return 'DROP place visible and place label, which are replaced by location';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE activitytype DROP placevisible');
+        $this->addSql('ALTER TABLE activitytype DROP placelabel');
+    }
+}
diff --git a/src/Bundle/ChillActivityBundle/translations/messages.fr.yml b/src/Bundle/ChillActivityBundle/translations/messages.fr.yml
index 3de1cc600..00715d283 100644
--- a/src/Bundle/ChillActivityBundle/translations/messages.fr.yml
+++ b/src/Bundle/ChillActivityBundle/translations/messages.fr.yml
@@ -146,8 +146,8 @@ User visible: Visibilité du champ Utilisateur
 User label: Libellé du champ Utilisateur
 Date visible: Visibilité du champ Date
 Date label: Libellé du champ Date
-Place visible: Visibilité du champ Lieu
-Place label: Libellé du champ Lieu
+Location visible: Visibilité du champ Lieu
+Location label: Libellé du champ Lieu
 Third parties visible: Visibilité du champ Tiers
 Third parties label: Libellé du champ Tiers
 Duration time visible: Visibilité du champ Durée
diff --git a/src/Bundle/ChillPersonBundle/Entity/AccompanyingPeriod.php b/src/Bundle/ChillPersonBundle/Entity/AccompanyingPeriod.php
index dcd3c2df0..849983187 100644
--- a/src/Bundle/ChillPersonBundle/Entity/AccompanyingPeriod.php
+++ b/src/Bundle/ChillPersonBundle/Entity/AccompanyingPeriod.php
@@ -25,6 +25,7 @@ use Chill\PersonBundle\Entity\AccompanyingPeriod\Comment;
 use Chill\PersonBundle\Entity\AccompanyingPeriod\Origin;
 use Chill\PersonBundle\Entity\AccompanyingPeriod\Resource;
 use Chill\PersonBundle\Entity\SocialWork\SocialIssue;
+use Chill\PersonBundle\Validator\Constraints\AccompanyingPeriod\AccompanyingPeriodValidity;
 use Chill\PersonBundle\Validator\Constraints\AccompanyingPeriod\ParticipationOverlap;
 use Chill\PersonBundle\Validator\Constraints\AccompanyingPeriod\ResourceDuplicateCheck;
 use Chill\ThirdPartyBundle\Entity\ThirdParty;
@@ -58,6 +59,8 @@ use const SORT_REGULAR;
  *     "this.isConfidential and this.getUser === NULL",
  *     message="If the accompanying course is confirmed and confidential, a referrer must remain assigned."
  * )
+ *
+ * @AccompanyingPeriodValidity(groups={AccompanyingPeriod::STEP_DRAFT, AccompanyingPeriod::STEP_CONFIRMED})
  */
 class AccompanyingPeriod implements
     GroupSequenceProviderInterface,
diff --git a/src/Bundle/ChillPersonBundle/Entity/SocialWork/SocialIssue.php b/src/Bundle/ChillPersonBundle/Entity/SocialWork/SocialIssue.php
index 84d47796b..b8a9141e4 100644
--- a/src/Bundle/ChillPersonBundle/Entity/SocialWork/SocialIssue.php
+++ b/src/Bundle/ChillPersonBundle/Entity/SocialWork/SocialIssue.php
@@ -121,6 +121,27 @@ class SocialIssue
         return $ancestors;
     }
 
+    /**
+     * get all the ancestors of the social issue
+     *
+     * @param bool $includeThis if the array in the result must include the present SocialIssue
+     */
+    public function getAncestors(bool $includeThis = true): array
+    {
+        $ancestors = [];
+
+        if ($includeThis) {
+            $ancestors[] = $this;
+        }
+
+        $current = $this;
+        while ($current->hasParent()) {
+            $ancestors[] = $current = $current->getParent();
+        }
+
+        return $ancestors;
+    }
+
     /**
      * @return Collection|self[]
      */
diff --git a/src/Bundle/ChillPersonBundle/Tests/Entity/SocialWork/SocialIssueTest.php b/src/Bundle/ChillPersonBundle/Tests/Entity/SocialWork/SocialIssueTest.php
index f8f2e3b89..491a2fffb 100644
--- a/src/Bundle/ChillPersonBundle/Tests/Entity/SocialWork/SocialIssueTest.php
+++ b/src/Bundle/ChillPersonBundle/Tests/Entity/SocialWork/SocialIssueTest.php
@@ -61,4 +61,20 @@ final class SocialIssueTest extends TestCase
 
         $this->assertFalse($child->isDescendantOf($grandChild));
     }
+
+    public function testGetAncestors()
+    {
+        $parent = new SocialIssue();
+        $child = (new SocialIssue())->setParent($parent);
+        $grandChild = (new SocialIssue())->setParent($child);
+        $grandGrandChild = (new SocialIssue())->setParent($grandChild);
+        $unrelated = new SocialIssue();
+
+        $this->assertContains($parent, $grandGrandChild->getAncestors(true));
+        $this->assertContains($child, $grandGrandChild->getAncestors(true));
+        $this->assertContains($grandChild, $grandGrandChild->getAncestors(true));
+        $this->assertContains($grandGrandChild, $grandGrandChild->getAncestors(true));
+        $this->assertNotContains($grandGrandChild, $grandGrandChild->getAncestors(false));
+        $this->assertCount(0, $unrelated->getAncestors(false));
+    }
 }
diff --git a/src/Bundle/ChillPersonBundle/Validator/Constraints/AccompanyingPeriod/AccompanyingPeriodValidity.php b/src/Bundle/ChillPersonBundle/Validator/Constraints/AccompanyingPeriod/AccompanyingPeriodValidity.php
new file mode 100644
index 000000000..c4bd30ed3
--- /dev/null
+++ b/src/Bundle/ChillPersonBundle/Validator/Constraints/AccompanyingPeriod/AccompanyingPeriodValidity.php
@@ -0,0 +1,27 @@
+<?php
+
+/**
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Chill\PersonBundle\Validator\Constraints\AccompanyingPeriod;
+
+use Symfony\Component\Validator\Constraint;
+
+/**
+ * @Annotation
+ */
+class AccompanyingPeriodValidity extends Constraint
+{
+    public $messageSocialIssueCannotBeDeleted = 'The social %name% issue cannot be deleted because it is associated with an activity or an action';
+
+    public function getTargets()
+    {
+        return self::CLASS_CONSTRAINT;
+    }
+}
diff --git a/src/Bundle/ChillPersonBundle/Validator/Constraints/AccompanyingPeriod/AccompanyingPeriodValidityValidator.php b/src/Bundle/ChillPersonBundle/Validator/Constraints/AccompanyingPeriod/AccompanyingPeriodValidityValidator.php
new file mode 100644
index 000000000..d3df79c38
--- /dev/null
+++ b/src/Bundle/ChillPersonBundle/Validator/Constraints/AccompanyingPeriod/AccompanyingPeriodValidityValidator.php
@@ -0,0 +1,84 @@
+<?php
+
+/**
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Chill\PersonBundle\Validator\Constraints\AccompanyingPeriod;
+
+use Chill\ActivityBundle\Repository\ActivityACLAwareRepository;
+use Chill\ActivityBundle\Repository\ActivityRepository;
+use Chill\PersonBundle\Entity\AccompanyingPeriod;
+use Chill\PersonBundle\Entity\SocialWork\SocialIssue;
+use Chill\PersonBundle\Templating\Entity\SocialIssueRender;
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+use Symfony\Component\Validator\Exception\UnexpectedValueException;
+use function in_array;
+
+class AccompanyingPeriodValidityValidator extends ConstraintValidator
+{
+    private ActivityRepository $activityRepository;
+
+    private SocialIssueRender $socialIssueRender;
+
+    public function __construct(ActivityRepository $activityRepository, SocialIssueRender $socialIssueRender)
+    {
+        $this->activityRepository = $activityRepository;
+        $this->socialIssueRender = $socialIssueRender;
+    }
+
+    public function validate($period, Constraint $constraint)
+    {
+        if (!$constraint instanceof AccompanyingPeriodValidity) {
+            throw new UnexpectedTypeException($constraint, AccompanyingPeriodValidity::class);
+        }
+
+        if (!$period instanceof AccompanyingPeriod) {
+            throw new UnexpectedValueException($period, AccompanyingPeriod::class);
+        }
+
+        $socialIssues = [];
+
+        $activities = $this->activityRepository->findBy(['accompanyingPeriod' => $period]);
+
+        foreach ($activities as $activity) {
+            $socialIssues = $activity->getSocialIssues()->toArray();
+        }
+
+        foreach ($period->getWorks() as $work) {
+            $socialIssues[] = $work->getSocialAction()->getIssue();
+        }
+
+        $socialIssuesByKey = [];
+        foreach ($socialIssues as $si) {
+            $socialIssuesByKey[$si->getId()] = $si;
+        }
+
+        $periodIssuesWithAncestors = [];
+        foreach ($period->getSocialIssues() as $si) {
+            /** @var SocialIssue $si */
+            $periodIssuesWithAncestors = array_merge($periodIssuesWithAncestors, \array_map(
+                function (SocialIssue $si) { return $si->getId(); },
+                $si->getAncestors(true))
+            );
+        }
+
+        foreach ($socialIssuesByKey as $key => $si) {
+            if (!in_array($key, $periodIssuesWithAncestors)) {
+                $this->context
+                    ->buildViolation(
+                        $constraint->messageSocialIssueCannotBeDeleted
+                    )
+                    ->setParameter('%name%', $this->socialIssueRender->renderString($si, []))
+                    ->addViolation();
+            }
+        }
+    }
+}
diff --git a/src/Bundle/ChillPersonBundle/translations/validators.fr.yml b/src/Bundle/ChillPersonBundle/translations/validators.fr.yml
index c733a935c..b421e9f43 100644
--- a/src/Bundle/ChillPersonBundle/translations/validators.fr.yml
+++ b/src/Bundle/ChillPersonBundle/translations/validators.fr.yml
@@ -46,3 +46,4 @@ household_membership:
 '{{ name }} is already associated to this accompanying course.': '{{ name }} est déjà associé à ce parcours.'
 A course must contains at least one social issue: 'Un parcours doit être associé à au moins une problématique sociale'
 A course must be associated to at least one scope: 'Un parcours doit être associé à au moins un service'
+The social %name% issue cannot be deleted because it is associated with an activity or an action: 'La problématique sociale "%name%" ne peut pas être supprimée car elle est associée à une activité ou une action'