Do we file Nil GSTR-3B if a credit note from previous tax period was higher than combined supply ?

We issued a credit note in August which was quite large and higher than the combined turnover of the quarter ending in September and the quarter ending in December. For the September GSTR-3B, the value was automatically selected as zero. But for this quarter, the value of supply is showing automatically in GSTR-3B. Should be manually make it zero? The box turns "red" and says "The information entered by you in cells highlighted in red is in variance with the auto-populated data". 

For example, the credit note in August was for 10 lakh, and the combined turnover of last 6 months is only 5 lakh. So we also need to carry forward the credit to next quarter (ending in March 2023).