Hi Faisal,
It sounds like someone created the the ORG field in QA but not DEV or the PFCG ORG CREATE change got overwritten or as Julius pointed out GRC Add-On software is the culprit.
Depending on your prefered resolution - Either,
1. Run PFCG_ORGFIELD_DELETE in QA on field CLASS
2. Run PFCG_ORGFIELD_CREATE in DEV on field CLASS
Both environments run PFCG_ORGFIELD_ROLES to synch.
Thanks,
Patrick