Batch Job failed- Errorlog

HI,

Batch job failed with the below error:

Error: Index of table <> is in UNUSABLE state. Unique index constraint violated. Drop index, remove duplicates from table.

Recently did enhancements to the job by adding new fields and defined join conditions as below, the DS version is 3.2.

In From tab:

Outer source   /   Inner source

LFA1              /     ADRC

LFA1             /      ADRCT

LFA1            /       ZNIT

In WHERE tab:

LFA1.ADRNR = ADRC.ADRNR AND

ZNIT.LIFNR  = LFA1.LIFNR   AND

LFA1.ADRNR = ADRCT.ADRNR AND

LFA1.SPRAS = 'E'