Warning - Import Items using mtl_system_items_interface

Hi

Can someone help me? I'm entering data in mtl_system_items_interface to update the list price. The insert:

insert into mtl_system_items_interface (inventory_item_id,process_flag,transaction_type,organization_id,set_process_id,LIST_PRICE_PER_UNIT) values (44,1,'UPDATE',242,1111202410005,41.9);

But I'm getting the following errors:

TRANSACTION ID : 1734447ORGANIZATION ID : -1TABLE NAME : MTL_SYSTEM_ITEMS_INTERFACECOLUMN NAME : TRANSACTION_TYPEMESSAGE NAME : INV_INT_TRXTYPCODEERROR MESSAGE : Invalid transaction typeValidation errors occured during Import ItemRefer to table MTL_INTERFACE_ERRORS to access validation errors

Thank you
Ana