Document Spilting Clarification

Dear Experts,

We want clarification , during the posting the  transaction in F-28 we got error Item category 02000 is missing (obligatory in accounting transaction 0200/001)

we know that for the for the GL we need to assign item category 02000  as customer .

but our client is not willing to change the configuration  , for all the GL till yet we have not assigned the 02000 category  , till now how system is posted the revenue against the customer account

please check our below screen shot .kindly help us.

Regards

Hidyath