AI-generated Key Takeaways
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          This enum describes possible errors related to campaign budgets. 
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          Errors can occur if a budget is not shared, has been removed, or is still in use by a campaign. 
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          Issues arise with implicitly shared budgets regarding modifications, updating to explicitly shared, and use with multiple campaigns. 
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          Money amount errors include incorrect currency, being less than the minimum CPC, being too large, negative, or not a multiple of the minimum unit. 
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          Budget period and delivery mode constraints can also cause errors. 
Enum describing possible campaign budget errors.
| Enums | |
|---|---|
| 
 | Enum unspecified. | 
| 
 | The received error code is not known in this version. | 
| 
 | The campaign budget cannot be shared. | 
| 
 | The requested campaign budget no longer exists. | 
| 
 | The campaign budget is associated with at least one campaign, and so the campaign budget cannot be removed. | 
| 
 | Customer is not on the allow-list for this campaign budget period. | 
| 
 | This field is not mutable on implicitly shared campaign budgets | 
| 
 | Cannot change explicitly shared campaign budgets back to implicitly shared ones. | 
| 
 | An implicit campaign budget without a name cannot be changed to explicitly shared campaign budget. | 
| 
 | Cannot change an implicitly shared campaign budget to an explicitly shared one. | 
| 
 | Only explicitly shared campaign budgets can be used with multiple campaigns. | 
| 
 | A campaign budget with this name already exists. | 
| 
 | A money amount was not in the expected currency. | 
| 
 | A money amount was less than the minimum CPC for currency. | 
| 
 | A money amount was greater than the maximum allowed. | 
| 
 | A money amount was negative. | 
| 
 | A money amount was not a multiple of a minimum unit. | 
| 
 | Total budget amount must be unset when BudgetPeriod is DAILY. | 
| 
 | The period of the budget is not allowed. | 
| 
 | Cannot use accelerated delivery method on this budget. | 
| 
 | Budget amount must be unset when BudgetPeriod is CUSTOM. | 
| 
 | Budget amount or total amount must be above this campaign's per-day minimum. See the error's details.budget_per_day_minimum_error_details field for more information. |