I wouldn't spend a lot of time trying to repair that. Would suggest just using a product like restore a finish
https://www.homedepot.com/p/Howard-16-oz-Walnut-Wood-Finish-Restorer-RF4016/100199071
https://www.homedepot.com/p/Howard-16-oz-Walnut-Wood-Finish-Restorer-RF4016/100199071