diff --git a/plugin.manifest b/plugin.manifest
index 15b10516051c52dc82653f60677d86cebd147f1a..3921d09259bf8123fcb28dbb389c1e13f9eaea7b 100755
--- a/plugin.manifest
+++ b/plugin.manifest
@@ -1,6 +1,6 @@
 pluginname=CourseCopy
 pluginclassname=CourseCopy
-version=1.9.1
+version=1.9.2
 origin=data-quest
 studipMinVersion=4.0
 studipMaxVersion=5.1.99
diff --git a/views/action/checkbox.php b/views/action/checkbox.php
index a65a134d8aa3c5fdbb2eee7cc11c3d709526e0f0..c8119916f6ea6dfca6b6c4260b3ebe45b169e6d3 100755
--- a/views/action/checkbox.php
+++ b/views/action/checkbox.php
@@ -1,3 +1,3 @@
-<? if (Seminar_Perm::get()->have_studip_perm('dozent', $course_id)) : ?>
+<? if (Seminar_Perm::get()->have_studip_perm('dozent', $course_id) && !LockRules::check($course_id, 'seminar_copy')) : ?>
 <input type="checkbox" name="c[]" value="<?= htmlReady($course_id) ?>">
 <? endif ?>
\ No newline at end of file