Can an Indian citizen with Singapore PR appy for Singapore Passport?

Hi , i am currently a singapore PR with indian passport but am i eligible to apply for singapore passport.........i know that currently i have indian passport but still after you get PR of singapore you will not passport but only you will be allow to stay in singapore without any restrictions cause u r already have PR, are there any chances of applying for singapore passport and still is there any option that ICA can approve or you will be rejected......cause you are holding indin passport