diff --git a/lam/lib/config.inc b/lam/lib/config.inc
index 5c26bc2e..50b95c91 100644
--- a/lam/lib/config.inc
+++ b/lam/lib/config.inc
@@ -2701,6 +2701,10 @@ class LAMCfgMain {
 	 */
 	public function importData($data) {
 		foreach ($data as $dataKey => $dataValue) {
+			if (!in_array($dataKey, $this->settings)) {
+				logNewMessage(LOG_WARNING, 'Ignored setting during import: ' . $dataKey);
+				continue;
+			}
 			if (!(is_array($dataValue) || is_string($dataValue) || is_int($dataValue) || is_bool($dataValue))) {
 				throw new LAMException('Invalid import data type for ' . htmlspecialchars($dataKey) . ': ' . gettype($dataValue));
 			}
diff --git a/lam/tests/lib/LAMCfgMainTest.php b/lam/tests/lib/LAMCfgMainTest.php
index 1368311f..812c2a95 100644
--- a/lam/tests/lib/LAMCfgMainTest.php
+++ b/lam/tests/lib/LAMCfgMainTest.php
@@ -146,6 +146,7 @@ class LAMCfgMainTest extends TestCase {
 		$importData['sessionTimeout'] = 240;
 		$importData['logLevel'] = LOG_ERR;
 		$importData['mailServer'] = 'mailserver';
+		$importData['IGNORE_ME'] = 'ignore';
 
 		$this->conf->importData($importData);