I had to make changes and republish my CDTs several times. Now when I package it

When you update/publish a CDT change you need to run Impact Analysis so all the items using the CDT get updated to use the new version. The error you are seeing indicates the reference has been updated in the export because the deleted types are not included in your application. However, you shouldn't rely on this feature because that means your items (e.g. models, data sources) in the source environment haven't been updated completely so I wouldn't expect your models to use the latest version of your CDT there.

You better run impact analysis (before the export) by selecting the checkbox next to your CDT in the Data Management tab and then clicking on "Impact Analysis" it will tell you what objects need to be updated, click "Update" and let it do the work.

More information at forum.appian.com/.../Data_Type_Impact_Analysis

When you update/publish a CDT change you need to run Impact Analysis so all the items using the CDT get updated to use the new version. The error you are seeing indicates the reference has been updated in the export because the deleted types are not included in your application. However, you shouldn't rely on this feature because that means your items (e.g. models, data sources) in the source environment haven't been updated completely so I wouldn't expect your models to use the latest version of your CDT there.

You better run impact analysis (before the export) by selecting the checkbox next to your CDT in the Data Management tab and then clicking on "Impact Analysis" it will tell you what objects need to be updated, click "Update" and let it do the work.

More information at forum.appian.com/.../Data_Type_Impact_Analysis