Incorrect assessment year

If in Challan you have mention AY 2016-17, don't worry, income tax department can adhust one AY up or down. don't change challan you can proceed without modifying challan.

futher if any problem arais for the department in future?

only one problem Arise which is default in filling in TDS Return i.e. Challan Not match.

But generally department avoid this type of default. you can talk with TDS Department on 1800 103 0344 for further clarification.