Error: "Please reduce the amount of data you're asking for, then retry your request"
In some cases, ad set duplication may fail with this error. This usually happens when the original ad set is highly complex. Such as having large audience exclusion lists or advanced targeting settings.
Which can exceed Meta’s backend data limits. Unfortunately, we have no control over this, as this is purely an API limitation from Meta's side and has been confirmed from Meta's team.
When this occurs, duplication is restricted by the platform and results in an error.
In these situations, the most reliable workaround is to create a new ad set instead of duplicating the existing one.