Drupal 7.x

A client has a Drupal site that is still running version 7.64. A php upgrade has introduced some incompatibilities. Is it necessary/recommended to update each minor version up to the current, or is it possible to update directly to 7.94 (as of this writing)?

I haven't used Drupal for a few years, now when I am back to my old site there is a problem I can't remember how to solve it. 

I have created a  custom theme and a template 'page--pagename.tpl.php'. It does not seem to pick the page with the name 'root/pagename'. It, however, picks and designs non-existing page if I go to root/pagename. I, of course, cleaned caches. I use local version on xampp.

Would be grateful for any help. 

how do I remove the word "title" from the products in the shopping cart?
I have Drupal 7.92 if that helps

Dear Support members,

What this message exactly means, when we edit page of a multilingual site :

"Fields that are used in all languages ​​are hidden to prevent conflicting changes. The hidden fields are editable in the original version of the content."

Hello, I've noticed that the watchdog table in a D7 db is over a million. The db itself is now over 700 mb even though the site has very little content or use. 

I tried to clear logs here admin/reports/dblog  but I was denied access even though I'm first user. 

Access denied
You are not authorized to access this page

Can I just delete all the entries in phpmyadmin?