diff --git a/config/schema/simplenews.schema.yml b/config/schema/simplenews.schema.yml
index bc0a09a..f157d58 100644
--- a/config/schema/simplenews.schema.yml
+++ b/config/schema/simplenews.schema.yml
@@ -199,9 +199,6 @@ field.value.simplenews_issue:
     sent_count:
       type: integer
       label: Sent count
-    subscribers:
-      type: integer
-      label: Subscriber count
 
 # Simplenews suscription field type schema.
 field.storage_settings.simplenews_subscription:
diff --git a/simplenews.install b/simplenews.install
index a24667e..fdfcf5a 100644
--- a/simplenews.install
+++ b/simplenews.install
@@ -143,3 +143,12 @@ function simplenews_install() {
 }
 
 
+/**
+ * Remove simplenews_issue field type.
+ */
+function simplenews_update_8001() {
+  $config = \Drupal::config('simplenews.settings');
+  $config->clear('field.value.simplenews_issue.subscribers');
+  $config->save();
+  // @todo Erase from database.
+}
diff --git a/src/Plugin/Field/FieldType/IssueItem.php b/src/Plugin/Field/FieldType/IssueItem.php
index d4ee728..ae15e6a 100644
--- a/src/Plugin/Field/FieldType/IssueItem.php
+++ b/src/Plugin/Field/FieldType/IssueItem.php
@@ -59,10 +59,6 @@ class IssueItem extends EntityReferenceItem {
       ->setLabel(t('Sent count'))
       ->setSetting('unsigned', TRUE);
 
-    $properties['subscribers'] = DataDefinition::create('integer')
-      ->setLabel(t('Subscribers'))
-      ->setSetting('unsigned', TRUE);
-
     return $properties;
   }
 
@@ -97,12 +93,6 @@ class IssueItem extends EntityReferenceItem {
       'unsigned' => TRUE,
       'not null' => FALSE,
     );
-    $schema['columns']['subscribers'] = array(
-      'description' => 'Counter of subscribers.',
-      'type' => 'int',
-      'unsigned' => TRUE,
-      'not null' => FALSE,
-    );
     return $schema;
   }