diff --git a/CHANGELOG.md b/CHANGELOG.md
index f527e281..ac83ad4a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@ We will follow [Semantic Versioning](http://semver.org/).
 
 ## UNRELEASED
 ### Fixed
+- Prevent undefined array key warning within `LinkingSuggestionsService`
 - Missing label of the tx_yoastseo_prominent_word table
 - Removed exclude=true from tx_yoastseo_prominent_word fields, table already has hideTable
 - Use `websiteTitle` of site configuration within snippet preview, previously this was only taken from site languages instead of the site itself
diff --git a/Classes/Service/LinkingSuggestionsService.php b/Classes/Service/LinkingSuggestionsService.php
index 8a8b0f9e..ad278175 100644
--- a/Classes/Service/LinkingSuggestionsService.php
+++ b/Classes/Service/LinkingSuggestionsService.php
@@ -253,10 +253,10 @@ protected function groupWordsByRecord(array $candidateWords): array
     {
         $candidateWordsByRecords = [];
         foreach ($candidateWords as $candidateWord) {
-            $recordKey = $candidateWord['uid_foreign'] . '-' . $candidateWord['tablenames'];
-            if (!array_key_exists('weight', $candidateWord) || !array_key_exists('df', $candidateWord)) {
+            if (!isset($candidateWord['weight'], $candidateWord['df'])) {
                 continue;
             }
+            $recordKey = $candidateWord['uid_foreign'] . '-' . $candidateWord['tablenames'];
             $candidateWordsByRecords[$recordKey][$candidateWord['stem']] = [
                 'weight' => (int)$candidateWord['weight'],
                 'df' => (int)$candidateWord['df']
@@ -348,7 +348,7 @@ protected function linkRecords(array $scores, array $currentLinks): array
                 'recordType' => $this->getRecordType($table),
                 'id' => $uid,
                 'table' => $table,
-                'cornerstone' => array_key_exists('tx_yoastseo_cornerstone', $data) ? (int)$data['tx_yoastseo_cornerstone'] : 0,
+                'cornerstone' => (int)($data['tx_yoastseo_cornerstone'] ?? 0),
                 'score' => $score,
                 'active' => isset($currentLinks[$record])
             ];