Error while installing package to production environment error "Servicepact" missing

Hi team 

hi team we have faced the installation error while moving the package to production environment and as per the error logs it says

Errors and(or) warnings occurred when compiling 'Default' workspace: 

[06:35:30] Autogenerated\Src\ServiceObjectSchema.CrtSLMITILService.cs(387,10) error CS0246: The type or namespace name 'ServicePact' could not be found (are you missing a using directive or an assembly reference?) 

[06:35:30] --- CompilerError info ---

    FileName: Autogenerated\Src\ServiceObjectSchema.CrtSLMITILService.cs

    Line: 387

    Column: 10

    ErrorNumber: CS0246

    ErrorText: The type or namespace name 'ServicePact' could not be found (are you missing a using directive or an assembly reference?)

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Can  someone tell us what this error is all about and how we can fix this error.

Thanks & Regards

Alok kumar