diff --git a/persistent_identifiers.routing.yml b/persistent_identifiers.routing.yml
index d1f654f..55089b7 100644
--- a/persistent_identifiers.routing.yml
+++ b/persistent_identifiers.routing.yml
@@ -5,3 +5,11 @@ persistent_identifiers.settings:
     _title: 'Persistent Identifiers'
   requirements:
     _permission: 'administer site configuration'
+persistent_identifiers.persist_all:
+  path: '/admin/config/persistent_identifiers/persist_all'
+  defaults:
+    _controller: '\Drupal\persistent_identifiers\Controller\PersistentIdentifiersController::persistent_identifiers_mint_and_persist'
+    _title: 'Persist objects'
+  requirements:
+    _permission: 'administer content'
+
diff --git a/src/Controller/PersistentIdentifiersController.php b/src/Controller/PersistentIdentifiersController.php
new file mode 100644
index 0000000..93c1c84
--- /dev/null
+++ b/src/Controller/PersistentIdentifiersController.php
@@ -0,0 +1,110 @@
+<?php
+
+namespace Drupal\persistent_identifiers\Controller;
+
+use Drupal\Core\Controller\ControllerBase;
+use Symfony\Component\HttpFoundation\Request;
+
+
+
+class PersistentIdentifiersController extends ControllerBase {
+
+	/**
+	 * The function calling the batch process.
+	 */
+	function persistent_identifiers_mint_and_persist(Request $request) {
+		$operations[] = ['\Drupal\persistent_identifiers\Controller\PersistentIdentifiersController::persistent_identifiers_batch_process', []];
+		$batch = [
+			'title' => t('Persistent Identifiers Mint and Persist'),
+			'operations' => $operations,
+			'finished' => '\Drupal\persistent_identifiers\Controller\PersistentIdentifiersController::persistent_identifiers_finished_callback',
+			'init_message' => t('Batch is starting.'),
+			'progress_message' => t('Processed @current out of @total.'),
+		];
+
+		// Adds the batch sets
+		batch_set($batch);
+		// Process the batch and after redirect to the frontpage
+		return batch_process('admin/config/persistent_identifiers/settings');
+
+
+	}
+	/**
+	 * A Batch process function.
+	 */
+	function persistent_identifiers_batch_process(&$context) {
+		$config = \Drupal::config('persistent_identifiers.settings');
+		$types = $config->get('persistent_identifiers_bundles');
+
+		// QUICK HACK TODO: don't save zeroes if type not selected
+		foreach ($types as $key => $type) {
+			if ($types[$key] === 0) {
+				unset($types[$key]);
+			}
+		}
+		// END QUICK HACK
+
+		if (empty($context['sandbox'])) {
+			$query = \Drupal::entityQuery('node');
+
+			$count = $query->condition('type', $types)
+									->count()
+									->execute();
+
+			$context['sandbox']['progress'] = 0;
+			$context['sandbox']['current_id'] = 0;
+			$context['sandbox']['max'] = $count;
+		}
+
+		$limit = 25;
+		$query = \Drupal::entityQuery('node');
+
+		$result = $query->condition('type', $types)
+								 ->condition('nid', $context['sandbox']['current_id'], '>')
+								 ->sort('nid', 'ASC')
+								 ->range(0, $limit)
+								 ->execute();
+		$nodes = \Drupal::entityTypeManager()->getStorage('node')->loadMultiple($nids);
+
+		foreach ($nodes as $node) {
+			// Persist and Mint
+			$minter = \Drupal::service($config->get('persistent_identifiers_minter'));
+			$pid = $minter->mint($node);
+			if (is_null($pid)) {
+				\Drupal::logger('persistent_identifiers')->warning(t("Persistent identifier not created for node @nid.", ['@nid' => $node->id()]));
+				\Drupal::messenger()->addWarning(t("Problem creating persistent identifier for this node. Details are available in the Drupal system log."));
+				return;
+			}
+			$persister = \Drupal::service($config->get('persistent_identifiers_persister'));
+			if ($persister->persist($node, $pid)) {
+				\Drupal::logger('persistent_identifiers')->info(t("Persistent identifier %pid created for node @nid.", ['%pid' => $pid, '@nid' => $node->id()]));
+				\Drupal::messenger()->addStatus(t("Persistent identifier %pid created for this node.", ['%pid' => $pid]));
+			}
+
+			// Modify context for next batch run
+			$context['results'][] = $node->id . ' : ' . $node->title->value;
+			$context['sandbox']['progress']++;
+			$context['sandbox']['current_id'] = $node->id;
+			$context['message'] = $node->title->value;
+		}
+
+		if ($context['sandbox']['progress'] != $context['sandbox']['max']) {
+			$context['finished'] = $context['sandbox']['progress'] / $context['sandbox']['max'];
+		}
+	}
+
+  /**
+   * Function that signals that the mint and persist is finished.
+   */
+  public static function persistent_identifiers_finished_callback($success, $results, $operations) {
+
+  	if ($success) {
+  		$message = t('Persistent Identifers: Persisting complete');
+  	}
+  	else {
+  		$message = t('There were some errors.');
+  	}
+  	drupal_set_message($message);
+  }
+
+}
diff --git a/src/Persister/Generic.php b/src/Persister/Generic.php
index 47c8119..8f73490 100644
--- a/src/Persister/Generic.php
+++ b/src/Persister/Generic.php
@@ -47,7 +47,10 @@ public function getName() {
   public function persist(&$entity, $pid, $save = TRUE) {
     $target_field = trim($this->config->get('persistent_identifiers_target_field'));
     if (method_exists($entity, 'hasField') && $entity->hasField($target_field)) {
-      $entity->{$target_field}[] = $pid;
+			$existing_values = $entity->get($target_field)->getValue();
+			if(!in_array($pid, $existing_values)) {
+				$entity->{$target_field}[] = $pid;
+			}
     }
     else {
         \Drupal::messenger()->addMessage(t('This node does not have the required field (@field)', ['@field' => $target_field]));
diff --git a/src/Plugin/Form/PersistentIdentifiersSettingsForm.php b/src/Plugin/Form/PersistentIdentifiersSettingsForm.php
index 3b5fb99..7cadd1d 100644
--- a/src/Plugin/Form/PersistentIdentifiersSettingsForm.php
+++ b/src/Plugin/Form/PersistentIdentifiersSettingsForm.php
@@ -4,6 +4,7 @@
 
 use Drupal\Core\Form\ConfigFormBase;
 use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Url;
 
 /**
  * Admin settings form.
@@ -103,6 +104,19 @@ public function buildForm(array $form, FormStateInterface $form_state) {
         ],
       ],
     ];
+    $form['actions']['mint_and_persist'] = [
+      '#type' => 'link',
+      '#title' => 'Mint and Persist',
+      '#attributes' => [
+        'id' => 'mint-and-persist',
+        'class' => [
+          'button'
+        ],
+        'data-twig-id' => 'goto-step-one',
+      ],
+      '#weight' => 0,
+      '#url' => Url::fromRoute('persistent_identifiers.persist_all'),
+    ];
 
 
     return parent::buildForm($form, $form_state);