diff --git a/README.md b/README.md
index 5a0431f..24264b4 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,6 @@ Szkielet komponentu Joomla 6 do gromadzenia pytań testowych.
 
 ## Instalacja
 
-W Joomla wybierz **System → Install → Install from Folder** i wskaż ten katalog. Manifestem instalacyjnym jest `com_testquestions.xml` (wersja 1.6.2).
+W Joomla wybierz **System → Install → Install from Folder** i wskaż ten katalog. Manifestem instalacyjnym jest `com_testquestions.xml` (wersja 1.6.3).
 
 Po instalacji komponent jest dostępny w panelu administratora jako **Pytania testowe**.
diff --git a/administrator/components/com_testquestions/sql/updates/mysql/1.6.3.sql b/administrator/components/com_testquestions/sql/updates/mysql/1.6.3.sql
new file mode 100644
index 0000000..fe447de
--- /dev/null
+++ b/administrator/components/com_testquestions/sql/updates/mysql/1.6.3.sql
@@ -0,0 +1 @@
+-- Limit exam sheet selection to symbols beginning with E.
diff --git a/com_testquestions.xml b/com_testquestions.xml
index f70ad78..edc3bbe 100644
--- a/com_testquestions.xml
+++ b/com_testquestions.xml
@@ -4,7 +4,7 @@
     <creationDate>2026-10-14</creationDate>
     <author>Komponent</author>
     <license>GNU General Public License version 2 or later</license>
-    <version>1.6.2</version>
+    <version>1.6.3</version>
     <description>COM_TESTQUESTIONS_DESCRIPTION</description>
     <element>com_testquestions</element>
     <namespace path="src">Komponent\Component\Testquestions</namespace>
diff --git a/components/com_testquestions/src/Model/QuestionsModel.php b/components/com_testquestions/src/Model/QuestionsModel.php
index dd88009..818d2c0 100644
--- a/components/com_testquestions/src/Model/QuestionsModel.php
+++ b/components/com_testquestions/src/Model/QuestionsModel.php
@@ -53,6 +53,7 @@ class QuestionsModel extends ListModel
                 ->leftJoin($db->quoteName('#__testquestions_categories', 'c') . ' ON c.id = q.category_id')
                 ->where('q.' . $db->quoteName('published') . ' = 1')
                 ->where('q.' . $db->quoteName('test_symbol') . ' <> ' . $db->quote(''))
+                ->where('q.' . $db->quoteName('test_symbol') . ' LIKE ' . $db->quote('E%'))
                 ->group(['q.' . $db->quoteName('test_symbol'), 'q.' . $db->quoteName('exam_year'), 'c.' . $db->quoteName('title')])
                 ->order('q.' . $db->quoteName('exam_year') . ' DESC, q.' . $db->quoteName('test_symbol') . ' ASC')
         )->loadObjectList();
diff --git a/components/com_testquestions/tmpl/questions/default.xml b/components/com_testquestions/tmpl/questions/default.xml
index 1404d68..0e2a017 100644
--- a/components/com_testquestions/tmpl/questions/default.xml
+++ b/components/com_testquestions/tmpl/questions/default.xml
@@ -6,7 +6,7 @@
     <fields name="request">
         <fieldset name="request">
             <field name="test_symbol" type="sql" label="COM_TESTQUESTIONS_TEST_SYMBOL" description="COM_TESTQUESTIONS_MENU_TEST_SYMBOL_DESC"
-                query="SELECT DISTINCT test_symbol AS value, test_symbol AS text FROM #__testquestions_questions WHERE published = 1 AND test_symbol &lt;&gt; '' ORDER BY test_symbol"
+                query="SELECT DISTINCT test_symbol AS value, test_symbol AS text FROM #__testquestions_questions WHERE published = 1 AND test_symbol LIKE 'E%' ORDER BY test_symbol"
                 key_field="value" value_field="text" />
         </fieldset>
     </fields>