Message type: E = Error
Message class:  LB - Logistics: Batch - Management 
Message number: 083
Message text: Proportion valuation & for material & deleted in valuation area &
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The SAP error message LB083 typically indicates an issue related to proportion valuation for a material that has been deleted in a specific valuation area. This error can occur in the context of inventory management and material valuation processes. Here’s a breakdown of the cause, potential solutions, and related information:
Cause: Deleted Material: The error suggests that the material in question has been marked as deleted in the valuation area. This means that the system cannot process transactions related to this material. Proportion Valuation: The error may arise when the system attempts to perform a valuation calculation for a material that is no longer valid or active in the specified valuation area.
Configuration Issues: There may be configuration issues in the material master or valuation area settings that lead to this error.
Solution: Check Material Status: Go to the material master record (transaction code MM03) and check the status of the material in the relevant valuation area.
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