Old Author has Old theme

wordpress

#1

Hello,
Please Advice We have an old theme on themeforest market (from 2015) but it was built by old framework as its not compatible now with Envato theme check, and we have a lot of customers purchase our theme and we get a lot of update rejections

We already working to fix all issues but need to know Can we make major update which will cause problems for our customers with update process ?

Thanks,