Fractured block found during backing up datafile

{hostname}, Hex dump of (file 75, block 87980) in trace file /oracle/diag/rdbms/db1/db1/trace/db1_ora_23614.trc
Corrupt block relative dba: 0x12c157ac (file 75, block 87980)
Fractured block found during backing up datafile
Data in bad block:
 type: 6 format: 2 rdba: 0x12c157ac
 last change scn: 0x02d7.7dc0c4bc seq: 0x2 flg: 0x04
 spare1: 0x0 spare2: 0x0 spare3: 0x0
 consistency value in tail: 0xb1a20602
 check value in block header: 0xc892
 computed block checksum: 0x67fa
Reread of blocknum=87980, file=+DATA/db1/datafile/file1.343.956407117. found valid data : 

dbv file=+DATA/db1/datafile/file1.343.956407117 blocksize=8192 start=87980 end=87981 userid=sys/blbla

DBVERIFY: Release 11.2.0.4.0 - Production on Thu Mar 22 10:04:33 2018

Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.

DBVERIFY - Verification starting : FILE = +DATA/db1/datafile/file1.343.956407117


DBVERIFY - Verification complete

Total Pages Examined         : 2
Total Pages Processed (Data) : 0
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 2
Total Pages Failing   (Index): 0
Total Pages Processed (Other): 0
Total Pages Processed (Seg)  : 0
Total Pages Failing   (Seg)  : 0
Total Pages Empty            : 0
Total Pages Marked Corrupt   : 0
Total Pages Influx           : 0
Total Pages Encrypted        : 0
Highest block SCN            : 0 (0.0)