Hi
Can you share the OB74 screen shot for the said GL and the error screen shot for F.13? if you have maintained ZUONR for the GL Account in OB74 and the same value is populated on both the line items with debit and credit sign for the same amount, they should get cleared by F.13 as well. There is no restriction that F.13 clears based on header only
Regards
Sanil Bhandari