When you see this error message, you can mitigate this by:
- setting the type of the List Data macro to auto complete, OR;
- narrowing down the options by providing more specific parameters (such as Space, Ancestor, Parent, Labels, etc.) if you're using Content Options source, OR;
- narrowing down the options by providing more specific parameters (such as Groups, Space, or Users) if you're using User Options source.
The List Data limit is set by your administrator to avoid performance issues that may come from processing a huge number of List Data items.
If you're an administrator, refer to the Configuring the limit for List Data items guide to configure the limit.