Miniworkflow Approve content fails while lock model

Precondition:
- there are 2 models, both use same objects as occurrence copies
- start "Approve content" on model1
- wait until human task "Approve content" is reached
- start "Approve content" on model2
Result: workflow fails at function "lock model"

Mail Message
Subject: Process Governance error
Dear Process Governance administrator,

An unexpected error occurred performing activity 'Lock model' with GUID 'd90ff056-eaca-11e2-0dd1-782bcb20a248' in model 'Approve content' in process 'Approve content'.

The error occurred in the process instance that was created on 06/8/2016 at 10:04 by system. The instance was started in this context:

Model2

Error description: 'Locking model 'Model2' with objects failed because locking was not possible for some of the model's objects.'. Refer to the attached technical details to obtain further information.

Best regards,
Process Governance
Attachments: input.xml, error.txt

Workaround:
- edit model ARIS Connect Governance Models/Main group/02 Processes/Model workflows/Approve content/Approve content
- open data flow of function "Lock model"
- remove "True" from "Include objects"
- add constant "False" to "Include objects"
- deploy process (I will send you an additional email how to do that).

Please implement a way for future versions, that the mini workflow doesn't fail in this case.

see also

https://itrac.eur.ad.sag/browse/AGG-10212

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