Purchase Order unit CAR allows fewer decimal places only

Dear Experts,

We have an issue in production server that while raising the return PO for the article invoiced as 0.3 CAR. Article master conversion is maintained as 1CAR=10EA.

Cycle goes like PO created for 1 CAR by the store and for same DC raised OBD, PGI, Intercompany billing & GRN for 0.3 CAR. Now store wants to raise the return PO for 0.3 CAR ( As referenced qty in Intercompany invoice ) but system reflecting the issue like Purchase order unit CAR allows fewer decimal places only. Message no. ME678. I am here by attaching the error screen shot for reference.

Kindly suggest on the same

Message no. ME678

Thanks & Regards,

Neel