[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-13 UTC."],[],[],null,["# enum CommonError.Reason (v202508)\n\n**Service** \n[AdRuleService](/ad-manager/api/reference/v202508/AdRuleService.CommonError.Reason) [AdjustmentService](/ad-manager/api/reference/v202508/AdjustmentService.CommonError.Reason) [AdsTxtService](/ad-manager/api/reference/v202508/AdsTxtService.CommonError.Reason) [AudienceSegmentService](/ad-manager/api/reference/v202508/AudienceSegmentService.CommonError.Reason) [CdnConfigurationService](/ad-manager/api/reference/v202508/CdnConfigurationService.CommonError.Reason) [CmsMetadataService](/ad-manager/api/reference/v202508/CmsMetadataService.CommonError.Reason) [CompanyService](/ad-manager/api/reference/v202508/CompanyService.CommonError.Reason) [ContactService](/ad-manager/api/reference/v202508/ContactService.CommonError.Reason) [ContentBundleService](/ad-manager/api/reference/v202508/ContentBundleService.CommonError.Reason) [ContentService](/ad-manager/api/reference/v202508/ContentService.CommonError.Reason) [CreativeService](/ad-manager/api/reference/v202508/CreativeService.CommonError.Reason) [CreativeSetService](/ad-manager/api/reference/v202508/CreativeSetService.CommonError.Reason) [CreativeTemplateService](/ad-manager/api/reference/v202508/CreativeTemplateService.CommonError.Reason) [CreativeWrapperService](/ad-manager/api/reference/v202508/CreativeWrapperService.CommonError.Reason) [CustomFieldService](/ad-manager/api/reference/v202508/CustomFieldService.CommonError.Reason) [CustomTargetingService](/ad-manager/api/reference/v202508/CustomTargetingService.CommonError.Reason) [DaiAuthenticationKeyService](/ad-manager/api/reference/v202508/DaiAuthenticationKeyService.CommonError.Reason) [DaiEncodingProfileService](/ad-manager/api/reference/v202508/DaiEncodingProfileService.CommonError.Reason) **ForecastService** [InventoryService](/ad-manager/api/reference/v202508/InventoryService.CommonError.Reason) [LabelService](/ad-manager/api/reference/v202508/LabelService.CommonError.Reason) [LineItemCreativeAssociationService](/ad-manager/api/reference/v202508/LineItemCreativeAssociationService.CommonError.Reason) [LineItemService](/ad-manager/api/reference/v202508/LineItemService.CommonError.Reason) [LineItemTemplateService](/ad-manager/api/reference/v202508/LineItemTemplateService.CommonError.Reason) [LiveStreamEventService](/ad-manager/api/reference/v202508/LiveStreamEventService.CommonError.Reason) [MobileApplicationService](/ad-manager/api/reference/v202508/MobileApplicationService.CommonError.Reason) [NativeStyleService](/ad-manager/api/reference/v202508/NativeStyleService.CommonError.Reason) [NetworkService](/ad-manager/api/reference/v202508/NetworkService.CommonError.Reason) [OrderService](/ad-manager/api/reference/v202508/OrderService.CommonError.Reason) [PlacementService](/ad-manager/api/reference/v202508/PlacementService.CommonError.Reason) [ProposalLineItemService](/ad-manager/api/reference/v202508/ProposalLineItemService.CommonError.Reason) [ProposalService](/ad-manager/api/reference/v202508/ProposalService.CommonError.Reason) [PublisherQueryLanguageService](/ad-manager/api/reference/v202508/PublisherQueryLanguageService.CommonError.Reason) [ReportService](/ad-manager/api/reference/v202508/ReportService.CommonError.Reason) [SegmentPopulationService](/ad-manager/api/reference/v202508/SegmentPopulationService.CommonError.Reason) [SiteService](/ad-manager/api/reference/v202508/SiteService.CommonError.Reason) [StreamActivityMonitorService](/ad-manager/api/reference/v202508/StreamActivityMonitorService.CommonError.Reason) [SuggestedAdUnitService](/ad-manager/api/reference/v202508/SuggestedAdUnitService.CommonError.Reason) [TargetingPresetService](/ad-manager/api/reference/v202508/TargetingPresetService.CommonError.Reason) [TeamService](/ad-manager/api/reference/v202508/TeamService.CommonError.Reason) [UserService](/ad-manager/api/reference/v202508/UserService.CommonError.Reason) [UserTeamAssociationService](/ad-manager/api/reference/v202508/UserTeamAssociationService.CommonError.Reason) [YieldGroupService](/ad-manager/api/reference/v202508/YieldGroupService.CommonError.Reason) **Dependencies** \n[CommonError](/ad-manager/api/reference/v202508/ForecastService.CommonError) \n▼\n**CommonError.Reason**\n\nDescribes reasons for common errors\n\n*** ** * ** ***\n\nNamespace\n:\n `https://www.google.com/apis/ads/publisher/v202508`\n\n| Enumeration | Description |\n|---------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------|\n| `NOT_FOUND` | Indicates that an attempt was made to retrieve an entity that does not exist. |\n| `ALREADY_EXISTS` | Indicates that an attempt was made to create an entity that already exists. |\n| `NOT_APPLICABLE` | Indicates that a value is not applicable for given use case. |\n| `DUPLICATE_OBJECT` | Indicates that two elements in the collection were identical. |\n| `CANNOT_UPDATE` | Indicates that an attempt was made to change an immutable field. |\n| `UNSUPPORTED_OPERATION` | Indicates that the requested operation is not supported. |\n| `CONCURRENT_MODIFICATION` | Indicates that another request attempted to update the same data in the same network at about the same time. Please wait and try the request again. |\n| `UNKNOWN` | The value returned if the actual value is not exposed by the requested API version. |"]]