Currency Data Goes NULL int Database

Hi,

On my local MAMP server I am experiencing that ‘currency_data’ column in ‘wp_currencies’ goes null after one day. here is related screenshot http://inspirythemes.com/sup-img/3_1AC2A158.png

According to my settings the update frequency is daily.

I think currency data should stay the same as the information it contains will remain the same all the time.

Thanks & Regards

https://ww.wp.xz.cn/plugins/wp-currencies/