002680: Failed to append <value> into the output. The relationships have a mismatch in GlobalID support.

Description

The annotation feature class relationship classes use different fields. They must be the same in order to append.

Solution

Ensure that all feature classes have a Global ID field. Use the Add Global IDs tool to add one if necessary. Then use the Migrate Relationship Class tool to migrate the relationship class to use GlobalIDs and rerun the tool.