I have everything left as before. I didn’t have to do anything from scratch (but this is in my case, I don’t know how it will be for you).
I used this method:
https://wordpress.org/support/topic/steps-for-go-back-to-the-last-good-version/
Returned to the old version without problems. All page titles and descriptions are preserved.
Yes, I had a WP Editor. Thanks.
God bless you, Guillermo.