diff --git a/html/admin/setup.php b/html/admin/setup.php
index d7dd58c36..574c391b8 100644
--- a/html/admin/setup.php
+++ b/html/admin/setup.php
@@ -475,6 +475,9 @@ if ( DEBUG=='false' ) ob_start();
     $max=getDbValue($db,'select last_value from s_jnt_fic_att_value');
     AlterSequence($db,'s_jnt_fic_att_value',$max+1);
   } // version 
+  if ( GetVersion($db) == 18 ) { 
+    ExecuteScript($db,'sql/patch/upgrade18.sql');
+  } // version 
 
 if ( DEBUG == 'false') ob_end_clean();
  }//for
@@ -563,6 +566,9 @@ if (DEBUG == 'false' ) ob_start();
     $max=getDbValue($db,'select last_value from s_jnt_fic_att_value');
     AlterSequence($db,'s_jnt_fic_att_value',$max+1);
   } // version 
+  if ( GetVersion($db) == 18 ) { 
+    ExecuteScript($db,'sql/patch/upgrade18.sql');
+  } // version 
 
 if ( DEBUG == 'false') ob_end_clean();
  }
diff --git a/html/admin/sql/patch/upgrade18.sql b/html/admin/sql/patch/upgrade18.sql
new file mode 100644
index 000000000..5f3e68e06
--- /dev/null
+++ b/html/admin/sql/patch/upgrade18.sql
@@ -0,0 +1,5 @@
+begin;
+alter table parm_periode drop constraint parm_periode_p_start_key;
+
+update version set val=19;
+commit;
\ No newline at end of file