Different execution plan for same SQL_ID

Why do we see different hash value and different execution plan for same sql_id ? It is on 10204.

select * from table(dbms_xplan.display_awr('62cvdnk9bcwzq'))

PLAN_TABLE_OUTPUT
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SQL_ID 62cvdnk9bcwzq
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select A.RATECD ,A.RATE ,A.RCATG  from CUST_RATE_SEGMENT A where ((((A.HOUSE=:b0 and A.CUST=:b1)
and A.SERVICE_GROUP=:b2) and A.STARTDATE=(select max(B.STARTDATE)  from CUST_RATE_SEGMENT B where
((((B.HOUSE=A.HOUSE and B.CUST=A.CUST) and B.SERVICE_GROUP=A.SERVICE_GROUP) and B.OUTLET=A.OUTLET)
and B.RATECD=A.RATECD))) and A.STATUS=:b3) order by A.RATECD