Wrong selection of assessment year while generating Self Assessment Tax Challan

I have generated self assessment tax challan in the month of March 2019 to file ITR for AY 2019-20, but while selecting assessment year the person has wrongly selected assessment year as AY2018-19 instead of selecting 2019-20. Due to this, the tax amount is not getting displayed in 2019-20 26AS,instead it is showing in 2018-19 26AS for which year the tax has been already paid. Please provide necessary solution related to this.