How to create item automatically ?

Hello
I would like to create automatically différents items (with only one different value-field) when submit only one item in frontend, but I don't know how to do :
I tried an SQL query that create a row in the DB-table ..._flexicontent_item_tmp and a new line appears well in the Flexicontent manager in backend, but without the category and the type from SQL query and there is a error message :
Warning: Creating default object from empty value in /homepages/19/d607759087/htdocs/clickandbuilds/Flexi3/administrator/components/com_flexicontent/models/items.php on line 349
Is there a way to create item automatically please ?

can you explain and add your code ?

Hello

we have a FAQ article:
How to create a new FLEXIcontent item or edit an existing item by calling the FLEXIcontent item model in custom code

Yes this script seems to be exactly what I was looking for !
But when I execute the script in a Joomla! extension with $item_ID=0 (new item creation), I have an error message :
Fatal error: Call to undefined method stdClass::bind() in /.../administrator/components/com_flexicontent/models/parentclassitem.php on line 1978
And when I execute the script with $item_ID=161 (existing item modification), I have an other error message :
Fatal error: Call to a member function load() on boolean in /homepages/19/d607759087/htdocs/clickandbuilds/Flexi3/administrator/components/com_flexicontent/models/parentclassitem.php on line 3363

Maybe I forget something ?...