Service pack downgrade

Service pack downgrade

Hello,

We have a test environnement of SDP on version 14000 and our production environnement is on version 13010.
Because on the test environnement we noticed all custom views have disappeared, we want to roll back on service pack 13010 on the test environnement to test another upgrade like 13010 > 14004.
When I try to downgrade via UpdMgr.bat, I have an error.
I would like to know if service pack rollback are supported or if we have to redo the test environnement from 0 ?

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