When I try to open a course there is an error message:

 
Debug info: Unknown column 'grouping' in 'field list'
SELECT id, checklist, grouping FROM mdl_checklist_item WHERE checklist IN (?,?,?,?) AND userid = 0 AND itemoptional = 0 AND hidden = 0 ORDER BY checklist
[array (
0 => 34,
1 => 35,
2 => 36,
3 => 37,
)]
Error code: dmlreadexception
Stack trace: * line 486 of /lib/dml/moodle_database.php: dml_read_exception thrown

• line 1245 of /lib/dml/mysqli_native_moodle_database.php: call to moodle_database->query_end()
• line 1400 of /lib/dml/moodle_database.php: call to mysqli_native_moodle_database->get_records_sql()
• line 242 of /blocks/checklist/block_checklist.php: call to moodle_database->get_records_select()
• line 209 of /blocks/checklist/block_checklist.php: call to block_checklist->get_user_progress()
• line 98 of /blocks/checklist/block_checklist.php: call to block_checklist->show_checklist_overview()
• line 709 of /blocks/moodleblock.class.php: call to block_checklist->get_content()
• line 230 of /blocks/moodleblock.class.php: call to block_list->formatted_contents()
• line 1216 of /lib/blocklib.php: call to block_base->get_content_for_output()
• line 1268 of /lib/blocklib.php: call to block_manager->create_block_contents()
• line 374 of /lib/blocklib.php: call to block_manager->ensure_content_created()
• line 3950 of /lib/outputrenderers.php: call to block_manager->region_has_content()
• line 34 of /theme/studiumdigitale/layout/columns2.php: call to core_renderer->blocks()
• line 1287 of /lib/outputrenderers.php: call to include()
• line 1217 of /lib/outputrenderers.php: call to core_renderer->render_page_layout()
• line 244 of /course/view.php: call to core_renderer->header()
   

I deactivate the block in order to backup and restore the course without the block. that works but there seems to be a problem with the grouping-column.