Collections completes in Error

 Hi All,

Iam running Colelctions in R12.1  [ Vision ] enviroments the collection is ending with errors

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08-DEC 12:40:13 : In Procedure: handle_ORA_12034.
08-DEC 12:40:13 : Refreshing Snapshots One By One
08-DEC 12:40:13 : Error refreshing individual snapshot : APPS.MTL_TXN_REQUEST_LINES_SN
08-DEC 12:40:13 : Error : ORA-06502: PL/SQL: numeric or value error
ORA-12034: materialized view log on "INV"."MTL_TXN_REQUEST_LINES" younger than last refresh

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I understand from few metalink notes this can be a multiple resons [ referred Note:ID 204127.1] ]

any one has cleare idea how to resolve this error? appricte the help. Thanks  - Chandra.