Thank you @legalfalconA UCI number starting with CAN is a temp UCI ad will change to a permanent one which will be either a 8 or a 10 digit number and will look like:
11-1234-5678 or
1234-5678
See https://www.cic.gc.ca/english/helpcentre/answer.asp?qnum=013&top=4
Since you have a UCI before, once your application processing starts, you will get the same UCI on this application too. Once you have a UCI it will remain the same for as many applications you file, including the citizenship application after you become a PR.
So that means. In the question "have you applied for PR application before ? " I have to answer 'yes" and for the question "Does Neema have a UCI number?" I should provide the UCI number I received from my previous application. Is that correct? Just wanted to confirm.