Data to collect still appears even after the fields are disabled / multiple choice (checkbox)

**Describe the bug**
After disabling one of the fields you can include in the **"Attendees' data to collect"** section, it still appears in the reservation / public view (where the users could buy a ticket).

**To Reproduce**
Steps to reproduce the behaviour:
1. Go to the admin web
2. Inside the **"Attendees' data to collect"** section, choose a **"Multiple choice (checkbox)"** and deselect one of the elements you have added there previously
3. Save the changes
4. Go to the reservation/public view and try to buy a ticket. You will still see the previous values in the checkbox

**Expected behaviour**
We expect not to see the disabled element/s

**Screenshots**
* Admin

* Public

**Desktop (please complete the following information):**
- OS: OSx
- Browser: Chrome
- Version: 121

**Additional context**
Side note/another bug?: we found that using the "&" as a **Text value** in the **"Multiple choice (checkbox)"** made it impossible to continue with the reservation and, therefore, not move to the buying page.