Jira allows you to create projects with custom fields. Custom Jira fields will not affect the integration with Noibu. However, if the custom fields are mandatory, you will receive an error when trying to sync an issue with Jira. This is because the Noibu issue cannot satisfy the custom mandatory field.
To resolve this error, unsync the issue and change the mandatory field to an optional field in Jira.
If the with your Jira integration problem persists, reach out your CSM, or contact us at email@example.com.