You can change random stats option of gear and weapon by visiting Trisha and press the 2nd button from the menu
Changing stat option menu
①Drag the item from the inventory
②Item name will be shown
③You will need Energy Converter
④Shows number existing stats options will be changed
⑤Shows current existing stats options.
⑥Check on/off of the stats you want to change
⑦`Yes please change my soul vapor stat`
※⑥All new stats changed from 6 will be re-gaccha
※Once the stats were changed, there will be no going back.