HANA Backup fails with "wrong checksum" error

Hello HANA experts,

Our HANA (SPS 7) test database system backup ends with following error:

Could not back up system <SID> backup could not be completed, Wrong checksum: Calculated 1320888980, stored 1611380413.; $ppno$=

Error log contents:

145a59295ef ERROR BACKUP SAVE DATA finished with error: [447] backup could not be completed, [3020043] Wrong checksum: Calculated 1320888980, stored 1611380413.; $ppno$=

Further details:

Backup failure is for “index server”; backup for rest of the servers gets successfully completed.

How could I resolve this error? Any help is highly appreciated.

Thanks in advance,

Shaji