diff --git a/P/Sda1/Lectures/Surrogate/Data/lectures.xml b/P/Sda1/Lectures/Surrogate/Data/lectures.xml
index a550da1813005637047707a3f2408dcc5ede643e..c03a0fcbc0a54a16ae10a204dbd2ebf77e40f895 100644
--- a/P/Sda1/Lectures/Surrogate/Data/lectures.xml
+++ b/P/Sda1/Lectures/Surrogate/Data/lectures.xml
@@ -15,7 +15,7 @@ xsi:noNamespaceSchemaLocation="university.xsd">
             <description>Introduction to Java</description>
         </course>
 
-        <course number="1131099" lecturer="hahn">
+        <course number="113109" lecturer="hahn">
             <title>Mathematics</title>
         </course>