Created attachment 815593 [details]
Test run log file

Description of problem:
Occasionally an exception will occur when pressing add and close on the Add Maintainer dialog

Version-Release number of selected component (if applicable):
3.x

How reproducible:
Difficult, occasional

Steps to Reproduce:
1. Sign in as admin, go to a project
2. Press Manage Maintainers
3. Press Add Maintainer
4. Enter a maintainer name
5. Click the autocomplete
6. Click somewhere to populate the fields
7. Press Add
8. Press Close

Actual results:
Exception:
org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [org.zanata.model.HProject#1]

Expected results:
No exception.

Additional info:
Run log attached