diff --git a/config/schema/forum.schema.yml b/config/schema/forum.schema.yml
index dbe44fc91fe6635b26c08bc2716c75ba53b1098a..e8d411469a0e9d03deb7cd23ddc4516f450f901b 100644
--- a/config/schema/forum.schema.yml
+++ b/config/schema/forum.schema.yml
@@ -43,11 +43,6 @@ block.settings.forum_active_block:
   type: block_settings
   label: 'Active forum topics block'
   mapping:
-    properties:
-      type: sequence
-      label: 'Properties'
-      sequence:
-        type: string
     block_count:
       type: integer
       label: 'Block count'
@@ -56,11 +51,6 @@ block.settings.forum_new_block:
   type: block_settings
   label: 'New forum topics block'
   mapping:
-    properties:
-      type: sequence
-      label: 'Properties'
-      sequence:
-        type: string
     block_count:
       type: integer
       label: 'Block count'
diff --git a/src/Plugin/Block/ForumBlockBase.php b/src/Plugin/Block/ForumBlockBase.php
index 8095ceffb8e05fea514cf7d7fc47fbd08070d284..eeda4955386f3d1c11e981c238e25df987779669 100644
--- a/src/Plugin/Block/ForumBlockBase.php
+++ b/src/Plugin/Block/ForumBlockBase.php
@@ -44,9 +44,6 @@ abstract class ForumBlockBase extends BlockBase {
    */
   public function defaultConfiguration() {
     return [
-      'properties' => [
-        'administrative' => TRUE,
-      ],
       'block_count' => 5,
     ];
   }
diff --git a/tests/src/Kernel/Migrate/d6/MigrateBlockTest.php b/tests/src/Kernel/Migrate/d6/MigrateBlockTest.php
index aef056bdccc68fb49040ec2b72e8bc2c785ff736..214b78412907888583d6854c76012e7885e47f44 100644
--- a/tests/src/Kernel/Migrate/d6/MigrateBlockTest.php
+++ b/tests/src/Kernel/Migrate/d6/MigrateBlockTest.php
@@ -108,9 +108,6 @@ class MigrateBlockTest extends MigrateDrupal6TestBase {
       'provider' => 'forum',
       'label_display' => '0',
       'block_count' => 3,
-      'properties' => [
-        'administrative' => '1',
-      ],
     ];
     $this->assertEntity('forum', [], 'sidebar', 'olivero', -8, $settings);
 
@@ -120,9 +117,6 @@ class MigrateBlockTest extends MigrateDrupal6TestBase {
       'provider' => 'forum',
       'label_display' => '0',
       'block_count' => 4,
-      'properties' => [
-        'administrative' => '1',
-      ],
     ];
     $this->assertEntity('forum_1', [], 'sidebar', 'olivero', -9, $settings);
   }