Route is not changed CC is changed. Might be possible have to wait for max to max. 2 months. Or it can get opened by tomorrow. When CC is changing, these things generally happen. I wanted book ticket in 12703 for January but, i also faced same issues. I was try from August to get reservation, but it was opened in October. So it will surely get opened don't know when, but you can wait for that or can check for other alternatives.
please wait...Translate to HindiRoute change nahi hua CC badal gaya hai. Ho sakta hai ki max to max 2 mahine tak wait karna pade. Ya phir kal hi khul jaye. Jab CC badalta hai, tab aise chakkar chalte rehte hain. Maine January ke liye 12703 mein ticket book karna tha par, mujhe bhi yahi problem aayi. Maine August se reservation ke liye try kiya, par woh October mein hi khula. Toh yeh definitely khulega, pata nahi kab, lekin wait kar sakte ho ya phir kisi aur option ki bhi check kar sakte ho.