Main graph showing bad old data

[kedar700]

Hello,
I have problem with my graph for watching Global Wan in my local network. I have in the biggest spike about 6Gbps, but in 7 days history of the graph is the spike about 60Gbps - 72Gbps. I don't know what can be bad .









I use zabbix version 5.0.0

Thanks for tips

[kedar700]

I can't upload picture so there is link :
2 days https://i.imgur.com/dB2hnPz.png
7 days https://i.imgur.com/kMzi47D.png