I found a solution:
1. Revert back the 'i_agree_to_terms_and_rules' phrase.
STOP AT THIS STEP TILL BETA IS OVER. CONTINUE TO STEP TWO AT YOUR OWN RISK.
2. Change phrase back without removing '{checkbox}' in the phrase.
There's a reason why every release is accompanied by this statement:
This is Beta Software
Please remember that this is beta software. It contains known bugs and incomplete functionality. We do not recommend running beta software in a production environment, and support is limited at this time to questions here on the community forums.
I wouldn't class a phrase change as a major edit.
It was unfortunate that it was related to the checkbox used when registering but even so it's a very minor change.