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Could not read Lucene segments files in /dspace/solr/statistics/data/index
org.apache.lucene.index.IndexFormatTooOldException: Format version is not supported (resource: BufferedChecksumIndexInput(MMapIndexInput(path="/irmaag/dspace/solr/statistics/data/index/segments_41"))): -7 (needs to be between -9 and -11). This version of Lucene only supports indexes created with release 3.0 and later.	at org.apache.lucene.codecs.lucene3x.Lucene3xSegmentInfoReader.readLegacySegmentInfo(Lucene3xSegmentInfoReader.java:131)	at org.apache.lucene.codecs.lucene3x.Lucene3xSegmentInfoReader.readLegacyInfos(Lucene3xSegmentInfoReader.java:57)	at org.apache.lucene.index.SegmentInfos.read(SegmentInfos.java:414)	at org.apache.lucene.index.SegmentInfos$1.doBody(SegmentInfos.java:454)	at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:906)	at org.apache.lucene.index.SegmentInfos$FindSegmentsFile.run(SegmentInfos.java:752)	at org.apache.lucene.index.SegmentInfos.read(SegmentInfos.java:450)	at org.dspace.app.util.IndexVersion.getIndexVersion(IndexVersion.java:136)	at org.dspace.app.util.IndexVersion.main(IndexVersion.java:59)