Runs fail with duplicate key error

[dbenne]

When running DEXTER after some time the run fails with the below message:

System.AggregateException: One or more errors occurred. (An item with the same key has already been added. Key: cproxy)
---> System.ArgumentException: An item with the same key has already been added. Key: cproxy

Using the same job file with a different controller works as expected

[bhjelmar]

Please try with latest release, this issue should be fixed in version 21.6.0.0.