Error writing to database

Debug info: ERROR: invalid input syntax for integer: "100.00000"

INSERT INTO mdl_lti (name,intro,introformat,timecreated,timemodified,typeid,toolurl,securetoolurl,launchcontainer,instructorchoicesendname,instructorchoicesendemailaddr,instructorchoiceacceptgrades,instructorchoiceallowroster,instructorchoiceallowsetting,grade,instructorcustomparameters,debuglaunch,showtitlelaunch,showdescriptionlaunch,icon,secureicon,course,servicesalt) VALUES($1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12,$13,$14,$15,$16,$17,$18,$19,$20,$21,$22,$23) RETURNING id

[array (

'name' => 'Chemvantage Atoms and Elements Quiz',

'intro' => '<p>This is a link to a chemistry quiz from the ChemVantage site. The ChemVantage site is an example of an LTI compliant site which means it will connect to Moodle via the <a href="http://docs.moodle.org/en/External_tool" target="_blank">External Tool module</a> and will allow Moodle users to go directly to the relevant page without needing to log in again. Many LTI sites also send back grades to Moodle\'s gradebook.</p>',

'introformat' => '1',

'timecreated' => '1351682321',

'timemodified' => '1400656384',

'typeid' => 0,

'toolurl' => 'http://chem-vantage.appspot.com/lti/',

'securetoolurl' => '',

'launchcontainer' => '3',

'instructorchoicesendname' => '1',

'instructorchoicesendemailaddr' => '1',

'instructorchoiceacceptgrades' => '1',

'instructorchoiceallowroster' => NULL,

'instructorchoiceallowsetting' => NULL,

'grade' => '100.00000',

'instructorcustomparameters' => '',

'debuglaunch' => '0',

'showtitlelaunch' => '1',

'showdescriptionlaunch' => '1',

'icon' => '',

'secureicon' => '',

'course' => 6,

'servicesalt' => '53cc3f12425bd2.18875446',

)]

Error code: dmlwriteexception

Stack trace:

    line 446 of /lib/dml/moodle_database.php: dml_write_exception thrown

    line 244 of /lib/dml/pgsql_native_moodle_database.php: call to moodle_database->query_end()

    line 868 of /lib/dml/pgsql_native_moodle_database.php: call to pgsql_native_moodle_database->query_end()

    line 924 of /lib/dml/pgsql_native_moodle_database.php: call to pgsql_native_moodle_database->insert_record_raw()

    line 83 of /mod/lti/backup/moodle2/restore_lti_stepslib.php: call to pgsql_native_moodle_database->insert_record()

    line 137 of /backup/util/plan/restore_structure_step.class.php: call to restore_lti_activity_structure_step->process_lti()

    line 103 of /backup/util/helper/restore_structure_parser_processor.class.php: call to restore_structure_step->process()

    line 151 of /backup/util/xml/parser/processors/grouped_parser_processor.class.php: call to restore_structure_parser_processor->dispatch_chunk()

    line 91 of /backup/util/helper/restore_structure_parser_processor.class.php: call to grouped_parser_processor->postprocess_chunk()

    line 148 of /backup/util/xml/parser/processors/simplified_parser_processor.class.php: call to restore_structure_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 110 of /backup/util/plan/restore_structure_step.class.php: call to progressive_parser->process()

    line 181 of /backup/util/plan/base_task.class.php: call to restore_structure_step->execute()

    line 192 of /backup/moodle2/restore_activity_task.class.php: call to base_task->execute()

    line 177 of /backup/util/plan/base_plan.class.php: call to restore_activity_task->execute()

    line 167 of /backup/util/plan/restore_plan.class.php: call to base_plan->execute()

    line 333 of /backup/controller/restore_controller.class.php: call to restore_plan->execute()

    line 184 of /backup/util/ui/restore_ui.class.php: call to restore_controller->execute_plan()

    line 107 of /backup/restore.php: call to restore_ui->execute()