Hi,
1. Tested (8.82 PL04) and successfully added new item master with symbol /. Please refer below screen of OITM template and added data in B1.
Image may be NSFW.
Clik here to view.
Image may be NSFW.
Clik here to view.
Image may be NSFW.
Clik here to view.
2. Symbol / is used when updating blank values
Thanks & Regards,
Nagarajan