Turnover doubt for gst annual return Gstr-4

A registered composite scheme dealer sales turnover show in gstr-4 annual return
sales of goods turnover rs:70 lacs f.y.20-21
sales of goods turnover rs:85 lacs f.y.21-22
sales of goods turnover rs:80 lacs f.y.22-23.

dealer sales turnover f.y.22-23 decrease show in gstr-4 annual return
question:
dealer sales turnover increased every year any provision applicable in gst act