but it was recommended in telegram to first turn off node and then delete ipfs folder.
Lot of people also have time that is not synced, and it is important to sync it before validation.
Windows and some vps are very bad with this.
Check your time on:
https://time.is/
What's going on in Idena is far from mining, it's more similar to staking.
Where do you see staking at all in idena
the coins what you see in stake is just there so if you sell account you lose the stake as only way atm to release that coins is to kill the idenity
so in general is done to prevent identity trade which can lead to network attack