Indexserver fails during indexing to substitute properly duplicate-records in old metadata files with the old duplicate annotation

Indexserver fails during indexing to substitute properly duplicate-records in old metadata files with the old duplicate annotation.
The old annotation didn't contain the timestamp:

duplicate:"6543-248-20160825102648897-00000-sb-test-har-001.statsbiblioteket.dk.warc,3326617"

The new annotation looks like this

duplicate:"146-11-20160914143224138-00000-dia-prod-udv-01.kb.dk.warc.gz,44126,20160914143231635",content-size:4566";