2668556 - HANA DB does not start due to error "A downward catalog migration is not supported"

HANA DB does not start because of daemon startup failure. From the daemon traces, it can be seen that the issue is actually with the nameserver service:

Daemon traces:

[34505]{-1}[-1/-1] <timestamp> i Daemon           Daemon.cpp(00984) : comment file contains: nameserver: persistence initialization failed

[34505]{-1}[-1/-1] <timestamp> i Daemon           RunningInstance.cpp(00271) : Stop process hdbnameserver with pid 34521

And from nameserver traces:

[34541]{-1}[-1/-1] <timestamp> f topology         Topology.cpp(00337) : assign failed with persistence startup error. ERROR [SQL-3] fatal error: A downward catalog migration from 325 to 314 is not supported. at /sapmnt/ld7270/a/HDB/jenkins_prod/workspace/HANA__FA_CO_LIN64GCC5HAPPY_rel_fa~hana2sp01/s/ptime/query/catalog/catalog.cc:755

exception  1: no.71000003  (ptime/query/catalog/catalog.cc:755)

   A downward catalog migration from 325 to 314 is not supported.

exception throw location:

 1: 0x00007f421bc1daab in ptime::PtimeError::PtimeError(char const*, int,

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[34541]{-1}[-1/-1] 2018-07-08 21:22:50.246223 f NameServer       TREXNameServer.cpp(03861) : persistence initialization failed -> stopping instance ...

SAP HANA Platform Edition 1.0

SAP HANA Platform Edition 2.0

 hdblcm, upgrade, unsupported, migration , KBA , HAN-LM-INS-DB , Installation of HANA Database , Problem