Summary

In order to make all the properties of the NFT to its maximum value the user needs to stake for 4 days.

Vulnerability Details

Once the NFT is unstaked before 4 days not all skills are upgraded. After it's unstaked, in order to upgrade all the skills 4 full days is required. The previous staking period is not taken into account.

Impact

Tools Used

Recommendations

It could be good to count the first staking period as well.