When attempting to migrate a column, the following message is displayed:
Cannot create the field 'My Column' because the type 'Custom Field Type' is not supported.
This error usually happens when migrating a column that uses a custom field type, either developed in-house or that comes from a third party. If the field type is not available at the destination, Sharegate will not be able to create the column with this type.
Install the field type on the destination server and/or activate the features required for this field type to work properly.