The depth of the AdUnit in the inventory hierarchy is greater
than is allowed. The maximum allowed depth is two below the effective
root ad unit for Ad Manager 360 accounts and is one level below the
effective root ad unit for Ad Manager accounts.
INVALID_PARENT
The only valid AdUnit.parentId for an Ad Manager account is the
Network.effectiveRootAdUnitId, Ad Manager 360 accounts can specify an ad unit
hierarchy with more than two levels.
UNKNOWN
The value returned if the actual value is not exposed by the requested API version.
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-13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 AdUnitHierarchyError.Reason (v202508)\n\n**Service** \n[InventoryService](/ad-manager/api/reference/v202508/InventoryService.AdUnitHierarchyError.Reason) **PublisherQueryLanguageService** **Dependencies** \n[AdUnitHierarchyError](/ad-manager/api/reference/v202508/PublisherQueryLanguageService.AdUnitHierarchyError) \n▼\n**AdUnitHierarchyError.Reason**\n\n*** ** * ** ***\n\nNamespace\n:\n `https://www.google.com/apis/ads/publisher/v202508`\n\n| Enumeration | Description |\n|------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `INVALID_DEPTH` | The depth of the [AdUnit](/ad-manager/api/reference/v202508/InventoryService.AdUnit) in the inventory hierarchy is greater than is allowed. The maximum allowed depth is two below the effective root ad unit for Ad Manager 360 accounts and is one level below the effective root ad unit for Ad Manager accounts. |\n| `INVALID_PARENT` | The only valid [AdUnit.parentId](/ad-manager/api/reference/v202508/InventoryService.AdUnit#parentId) for an Ad Manager account is the [Network.effectiveRootAdUnitId](/ad-manager/api/reference/v202508/NetworkService.Network#effectiveRootAdUnitId), Ad Manager 360 accounts can specify an ad unit hierarchy with more than two levels. |\n| `UNKNOWN` | The value returned if the actual value is not exposed by the requested API version. |"]]
