Challan Sl number starting zero not getting saved

Sir 

Yestery I paid self assessment tax and filled all columns of taxed paid section of ITR2. challan sl no is 01334. Other things likes date BSR code amount all ok but when I am saving this info and again checking it , I find there is only four digit challan sl no 1334. Starting zero digit is not there. Two three times I edited put zero before 1334 but after saving and again checking that zero is not appearing. Will it creat any issue.

Please advice

Thank you