line 677 of /lib/dml/moodle_database.php: dml_exception thrown
line 1603 of /lib/dml/moodle_database.php: call to moodle_database->where_clause()
line 91 of /mod/lti/backup/moodle1/lib.php: call to moodle_database->get_field()
line 299 of /backup/converter/moodle1/lib.php: call to moodle1_mod_lti_handler->process_basiclti()
line 751 of /backup/converter/moodle1/lib.php: call to moodle1_converter->process_chunk()
line 178 of /backup/util/xml/parser/processors/grouped_parser_processor.class.php: call to moodle1_parser_processor->dispatch_chunk()
line 148 of /backup/util/xml/parser/processors/simplified_parser_processor.class.php: call to grouped_parser_processor->postprocess_chunk()
line 92 of /backup/util/xml/parser/processors/progressive_parser_processor.class.php: call to simplified_parser_processor->process_chunk()
line 190 of /backup/util/xml/parser/progressive_parser.class.php: call to progressive_parser_processor->receive_chunk()
line 278 of /backup/util/xml/parser/progressive_parser.class.php: call to progressive_parser->publish()
line ? of unknownfile: call to progressive_parser->end_tag()
line 179 of /backup/util/xml/parser/progressive_parser.class.php: call to xml_parse()
line 158 of /backup/util/xml/parser/progressive_parser.class.php: call to progressive_parser->parse()
line 150 of /backup/converter/moodle1/lib.php: call to progressive_parser->process()
line 129 of /backup/converter/convertlib.php: call to moodle1_converter->execute()
line 209 of /backup/util/helper/convert_helper.class.php: call to base_converter->convert()
line 462 of /backup/controller/restore_controller.class.php: call to convert_helper::to_moodle2_format()
line 92 of /backup/restore.php: call to restore_controller->convert()