GL Date gets populated even after setting null value at service mappings

Hello,

We updated OM Service Mappings to set null value to the GL Date attribute in ARInterfaceLine entity. When submitted a sales order GL Date got populated for order line (the line has warranty item) in RA_INTERFACE_LINES_ALL table even after setting a null value at service mappings.

Can anyone confirm whether the GL Date attribute can be set to null or this is a seeded functionality for warranty items?

Thanks,

Sumithra