AI-generated Key Takeaways
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          The document describes the EntityChildrenLimitReachedError, which is an error type used across several Ad Manager API services when a limit on child entities is reached. 
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          This error indicates various specific limit violations, such as reaching the maximum number of line items for an order, creative associations for a line item, or ad units for a placement. 
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          The error inherits from ApiErrorand includes fields likefieldPath,trigger, anderrorStringfor details about the error.
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          The reasonfield provides specific enumeration values detailing the exact limit that was exceeded.
- Namespace
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               https://www.google.com/apis/ads/publisher/v202502
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| ApiError(inherited) | |
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| EntityChildrenLimitReachedError | |
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 Enumerations 
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