refs #17991 [finc] re-introduce ISSN search

module/finc/src/finc/View/Helper/Root/Record.php

@@ -504,10 +504,7 @@ class Record extends \VuFind\View\Helper\Root\Record
             $queryParams['lookfor0'][] = $title;
             $queryParams['type0'][] = 'Title';
         }
-        $isn = $this->driver->tryMethod('getCleanISBN');
-        if (empty($isn)) {
-            $isn = $this->driver->tryMethod('getCleanISSN');
-        }
+        $isn = $this->driver->tryMethod('getCleanISSN');
         if (!empty($isn)) {
             $queryParams['lookfor0'][] = $isn;
             $queryParams['type0'][] = 'ISN';