3119069 - Indexserver doesn't start on Secondary Site: Could not read AnchorPage, none of x found copies contains valid data

Indexserver doesn't start on secondary site of an SAP HANA System Replication.

Indexserver traces show the following or similar errors:

[180170]{-1}[-1/-1] 2021-11-14 09:01:01.776305 i PhysicalPageAcce DataVolumePartitionFiles.cpp(00557) : DVolPartFiles: Partition at "/sapmnt/data/<SID>/mnt00001/hdb00003.00003/" closed
    [180170]{-1}[-1/-1] 2021-11-14 09:01:01.776625 f PersistenceLayer PersistenceController.cpp(00786) : startup failed exception  1: no.3000284  (DataAccess/impl/SavepointImpl.cpp:4511) TID: 180170
        Could not read AnchorPage, none of 2 found copies contains valid data
    exception throw location:
    1: 0x00007fff623fb808 in DataAccess::SavepointImpl::loadRestartPage(PageAccess::PageIO&, unsigned long, unsigned long, bool, bool, DataAccess::KeepSnapshotPolicy, bool, bool)+0x3ce8 at SavepointImpl.cpp:4511 (libhdbdataaccess.so)
    2: 0x00007fff624b35d8 in DataAccess::PersistenceManagerImpl::prepareOpen(unsigned long, unsigned long, bool, bool, DataAccess::KeepSnapshotPolicy, bool, bool)+0xb8 at PersistenceManagerImpl.cpp:2623 (libhdbdataaccess.so)
    3: 0x00007fff624de974 in DataAccess::PersistenceManager::openForRecovery(ltt::refcounted_handle<DataAccess::PersistenceConfiguration> const&)+0xe4 at PersistenceManager.cpp:188 (libhdbdataaccess.so)
    4: 0x00007fff64f46364 in PersistenceLayer::PersistenceSystem::initialize(NameServer::ServiceStartInfo const&, bool, PersistenceLayer::PERSISTENCE_MODE)+0x4c4 at PersistenceSystem.cpp:432 (libhdbpersistence.so)
    5: 0x00007fff64ee9968 in PersistenceLayer::PersistenceFactory::initPersistence(PersistenceLayer::PERSISTENCE_MODE, DataAccess::TransactionCallback*, NameServer::ServiceStartInfo&, ltt::refcounted_handle<TransactionManager::TransactionControlBlockFactory>&, bool, ltt::smartptr_handle<DataAccess::DisasterRecoverySecondaryCallback>&, bool)+0x6d8 at PersistenceFactory.cpp:460 (libhdbpersistence.so)
    6: 0x00007fff8a7e4e54 in PersistenceController::startup(PersistenceLayer::PERSISTENCE_MODE, NameServer::ServiceStartInfo*, bool, DataAccess::TablePreloadWriteCallback*, DataAccess::TablePreloadReadCallback*, Backup::RecoverCbc_Federation*)+0x1474 at PersistenceController.cpp:610 (libhdblogger.so)
    7: 0x000000010ff64134 in TRexAPI::TREXIndexServer::assign(NameServer::ServiceStartInfo&, bool, TREX_ERROR::TRexError&)+0x14e4 at TREXIndexServer.cpp:1248 (hdbindexserver)
    8: 0x000000010ff6cdfc in TRexAPI::AssignThread::run(void*)+0x3c at TREXIndexServer.cpp:544 (hdbindexserver)
    9: 0x00007fff643ccb54 in TrexThreads::PoolThread::run()+0xb44 at PoolThread.cpp:462 (libhdbbasement.so)
    10: 0x00007fff643cfdf8 in TrexThreads::PoolThread::run(void*&)+0x28 at PoolThread.cpp:142 (libhdbbasement.so)
    11: 0x00007fff5f567dd4 in Execution::Thread::staticMainImp(Execution::Thread*)+0x584 at Thread.cpp:522 (libhdbbasis.so)
    12: 0x00007fff5f552568 in Execution::pthreadFunctionWrapper(Execution::Thread*)+0x1a8 at ThreadInterposition.cpp:639 (libhdbbasis.so)
    13: 0x00007fff5ee48ae0 in start_thread+0x100 (libpthread.so.0)
    exception type information:
    - 0: public ltt::exception@0x7fff5edaf188

SAP HANA, platform edition 2.0

assign failed with persistence startup error; exception  1: no.3000284; , KBA , HAN-DB-HA , SAP HANA High Availability (System Replication, DR, etc.) , HAN-DB-PER , SAP HANA Database Persistence , HAN-DB-BAC , SAP HANA Backup & Recovery , Problem