ADDING MULTIPLE RECORDS TO A DETAIL - ISSUE

Hello community,

I need to configure adding multiple existing records to a detail based on existing ojbect (Section already created).

Here with the academy guide that I used, but it doesn't work correctly: https://academy.creatio.com/documents/technic-sdk/7-15/adding-multiple-records-detail?_gl=1*1ln1cf5*_gcl_au*OTIwNzIyODc2LjE2ODMzMDIzOTk.

Please find below my configuration of getMultiSelectLookupConfig() method:

getMultiSelectLookupConfig: function() {
				return {
					//The parent object of the detail object
					rootEntitySchemaName: "LgsFixture",
					//The column on the detail object that relates to the parent object
					rootColumnName: "LgsFixture",
					// The detail Object
					relatedEntitySchemaName: "LgsDelivery",
					// The column (lookup) on the detail object where the result of the lookup is stored
					relatedColumnName: "LgsDelivery"
				};
			}

Any help is appreciated.

Best Regards,