The issue got resolved. I have explicitly mentioned the column name in each join .. here is my the updated query
index=IndexA
| dedup ticketnumber
| fields ticketnumber,createddate,status
| join type=inner ticketnumber
[ search index=IndexB
|fields ticketnumber,MoveIndate,assignmentgroup]
| eval Move_Indate= strptime(MoveIndate , "%Y-%m-%d")
| eval created_date_= strptime(createddate, "%Y-%m-%d")
| where (MoveIndate >createddate)
| table ticketnumber,createddate,status,MoveIndate,assignmentgroup
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