selecting a blank item in SAP drop down

hi. i have a sap drop down where i want to select item number 11, which is totally blank. but it says max number is 10. i use navigate select item. i tried writing "" in the text but it doesnt work. how do i solve this? i can select all other items except this blank one

i tried spying in other modes as well, but sap spy mode is the only thing that finds the drop down