Error Code: 1009 (Resource you tried to manipulate is used somewhere and this manipulation is forbidden)
HTTP status Code: 400
Sometimes it is forbidden to edit some resource because it is used somewhere else.
Examples:
- remove custom-field when it is used on webforms
- remove custom-field when it is used in search-contacts (segmentation)
- remove from-field that is used
- removing goal when it is used in search-contacts (segmentation)
- removing goal-profile when it is used in searhc-contacts (segmentation)
- removing newsletter when it is used in search-contacts (segmentation)
- removing search-contacts (segments) when it is used as a target for sending messages