# When checkbox is mapped with custom boolean field, values of the custom field are always written into the form
**URL:** https://forum.mautic.org/t/when-checkbox-is-mapped-with-custom-boolean-field-values-of-the-custom-field-are-always-written-into-the-form/33935
**Category:** Mautic 5 Install/Upgrade Support
**Created:** [October 25, 2024, 12:46pm UTC](https://forum.mautic.org/t/when-checkbox-is-mapped-with-custom-boolean-field-values-of-the-custom-field-are-always-written-into-the-form/33935 "2024-10-25T12:46:07Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@myusername](https://forum.mautic.org/u/myusername)
#### Post date: [October 25, 2024, 12:46pm UTC](https://forum.mautic.org/t/when-checkbox-is-mapped-with-custom-boolean-field-values-of-the-custom-field-are-always-written-into-the-form/33935/1 "2024-10-25T12:46:07Z")
My Mautic version is: 5.1.1
My PHP version is: 8.2.24
My problem is:
# When checkbox is mapped with custom boolean field, values of the custom field are always written into the form
used always boolean contact fields (no/yes) mapped with a form checkbox to store if checkbox is checked by contact or not (e.g. newsletter request)
It is not possible in Mautic 5 because the selection “assign to fields list choice” doesn’t work
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### Author:  [@dirk\_s](https://forum.mautic.org/u/dirk_s)
#### Post date: [October 29, 2024, 2:41pm UTC](https://forum.mautic.org/t/when-checkbox-is-mapped-with-custom-boolean-field-values-of-the-custom-field-are-always-written-into-the-form/33935/2 "2024-10-29T14:41:35Z")
Thats now this issue:
>
>
> \### Mautic Series
>
> 5.1.x series
>
> \### Mautic installed version
>
> 5.1.1
>
> \### Way of… installing
>
> Other (please specify if relevant in the bug report)
>
> \### PHP version
>
> 8.2.24
>
> \### What browsers are you seeing the problem on?
>
> \_No response\_
>
> \### What happened?
>
> used always boolean contact fields (no/yes) mapped with a form checkbox to store if checkbox is checked by contact or not (e.g. newsletter request)
> It is not possible in Mautic 5 because the selection "assign to fields list choice" doesn't work:
> checkbox setting:
> !\[image\](https://github.com/user-attachments/assets/8147c17e-fdc9-40fa-853c-2c9083bd0600)
> result in form:
> !\[image\](https://github.com/user-attachments/assets/ec9f9a60-71d7-45aa-b204-5600b99f06fd)
>
>
> \### How can we reproduce this issue?
>
> Step 1: create a form with a checkbox (only 1 checkbox with custom label)
> Step 2: do not assign to fields list choice
> Step 3: Save
>
> \### Relevant log output
>
> \_No response\_
>
> \### Code of Conduct
>
> \- \[X\] I confirm that I have read and agree to follow this project's Code of Conduct
>
> \
\
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### Author:  [@chris001](https://forum.mautic.org/u/chris001)
#### Post date: [November 2, 2024, 11:22am UTC](https://forum.mautic.org/t/when-checkbox-is-mapped-with-custom-boolean-field-values-of-the-custom-field-are-always-written-into-the-form/33935/3 "2024-11-02T11:22:05Z")
i have the same issue. Is there a fix?
Did you find another way to get around the problem? Like you, I was planning to create a newsletter checkbox.