2363141 - Error: Retcode 1: SQL-error "1404-ORA-01404: ALTER COLUMN will make an index too large"

During upgrade, SUM displayed error below: 

3 ETP379X08:30:58: activating Nametab "<table name>"
2 ETP000 >> Name of inactive nametab to read : DDXTT
2 ETP000 >> Format of inactive nametab to read: 5.0
3 ETP355Xstatements:
3 ETP000 ALTER TABLE "<table name>"
3 ETP000 MODIFY ("<field>" VARCHAR2 (003999),
3 ETP000 "<field>" VARCHAR2 (003999))
3 ETP000
2WETP000 08:30:58: Retcode 1: error in DDL statement for <table name>" - repeat
2EETP345 08:31:10: Retcode 1: SQL-error "1404-ORA-01404: ALTER COLUMN will
make an index too large"
2EETP345 in DDL statement for "/BI0/APA_DS0200 "
2 ETP000 --------------- DB-ROLLBACK() ---------------
2EETP334 08:31:10: error in DDL, nametab for "<table name>" not activated
2 ETP301 ----------------------------------------------------------------------
3 ETP361 "0" Shadow-Nametabs activated, DDL executed
2 ETP362 "1" Shadow-Nametab activations failed
2 ETP360 Begin: Act. of Shadow-Nametabs with DDL ("2015/04/30 08:30:58")
2 ETP363 End : Act. of Shadow-Nametabs with DDL ("2015/04/30 08:31:10")
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