Recently been getting reports of Duplicate Entry for Key Primary

[Stephen Gilbert]

Our devs have recently started reporting that when performing code reviews in Crucible, they are often getting the error "Duplicate entry 'some_id' for key 'PRIMARY'"  They report that if they submit the review several times, eventually it does go through.  Does anyone have a solution for this?  I know we aren't running the latest version of Crucible.  When we tried to put the latest version in our testing environment, the software wouldn't even start, so I don't know if we want to fix the duplicate entry issue first, or fix the upgrade issue first.  Example error follows:

An error has occurred
Error
Server Error
Error 2
URL: /json/cru/CR-12582/changeStateAjax
An org.hibernate.exception.ConstraintViolationException was encountered
could not execute statement
Duplicate entry '386487' for key 'PRIMARY'
You are running release CR4.5.2 FE4.5.2 (20180123112923 2018-01-23), please report your release number when reporting bugs.