[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-06 UTC."],[],[],null,["# enum CustomFieldValueError.Reason (v202505)\n\n**Service** \n[CompanyService](/ad-manager/api/reference/v202505/CompanyService.CustomFieldValueError.Reason) [CreativeService](/ad-manager/api/reference/v202505/CreativeService.CustomFieldValueError.Reason) [CreativeSetService](/ad-manager/api/reference/v202505/CreativeSetService.CustomFieldValueError.Reason) **ForecastService** [LineItemCreativeAssociationService](/ad-manager/api/reference/v202505/LineItemCreativeAssociationService.CustomFieldValueError.Reason) [LineItemService](/ad-manager/api/reference/v202505/LineItemService.CustomFieldValueError.Reason) [LineItemTemplateService](/ad-manager/api/reference/v202505/LineItemTemplateService.CustomFieldValueError.Reason) [OrderService](/ad-manager/api/reference/v202505/OrderService.CustomFieldValueError.Reason) [ProposalLineItemService](/ad-manager/api/reference/v202505/ProposalLineItemService.CustomFieldValueError.Reason) [ProposalService](/ad-manager/api/reference/v202505/ProposalService.CustomFieldValueError.Reason) [UserService](/ad-manager/api/reference/v202505/UserService.CustomFieldValueError.Reason) **Dependencies** \n[CustomFieldValueError](/ad-manager/api/reference/v202505/ForecastService.CustomFieldValueError) \n▼\n**CustomFieldValueError.Reason**\n\nThe reasons for the target error.\n\n*** ** * ** ***\n\nNamespace\n:\n `https://www.google.com/apis/ads/publisher/v202505`\n\n| Enumeration | Description |\n|---------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `CUSTOM_FIELD_NOT_FOUND` | An attempt was made to modify or create a [CustomFieldValue](/ad-manager/api/reference/v202505/ForecastService.CustomFieldValue) for a [CustomField](/ad-manager/api/reference/v202505/CustomFieldService.CustomField) that does not exist. |\n| `CUSTOM_FIELD_INACTIVE` | An attempt was made to create a new value for a custom field that is inactive. |\n| `CUSTOM_FIELD_OPTION_NOT_FOUND` | An attempt was made to modify or create a [CustomFieldValue](/ad-manager/api/reference/v202505/ForecastService.CustomFieldValue) corresponding to a [CustomFieldOption](/ad-manager/api/reference/v202505/CustomFieldService.CustomFieldOption) that could not be found. |\n| `INVALID_ENTITY_TYPE` | An attempt was made to modify or create a [CustomFieldValue](/ad-manager/api/reference/v202505/ForecastService.CustomFieldValue) with an association to an entity of the wrong type for its field. |\n| `UNKNOWN` | The value returned if the actual value is not exposed by the requested API version. |"]]