ETL Error on a Destination DB Column

Hi,

Am doing an ETL from SQL Server data source to SQL Server Destination and I got this error message

"TITLE: Package Validation Error
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Package Validation Error

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ADDITIONAL INFORMATION:

Error at Data Flow Task [OLE DB Destination [36]]: Failure inserting into the read-only column "ProductID".

Error at Data Flow Task [OLE DB Destination [36]]: Column metadata validation failed.

Error at Data Flow Task [SSIS.Pipeline]: "OLE DB Destination" failed validation and returned validation status "VS_ISBROKEN".

Error at Data Flow Task [SSIS.Pipeline]: One or more component failed validation.

Error at Data Flow Task: There were errors during task validation.

 (Microsoft.DataTransformationServices.VsIntegration)

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BUTTONS:

OK
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Any help on this.

Thanks

me