"Incorrect level of item" warning message

Dear all:

When I try to create planned production order for a new defined item with new formula , the system display waring message “Incorrect level of item” , second time when I create new planned production order the system don’t display the message again!!?

Please advice

In Inventory and Warehouse Management - Perioidic - Bills of Material run the process to Recalculate BOM levels. Having low level codes out of synch can cause issues with planning etc.

Many thanks