Message type: E = Error
Message class:  ARUN_ITA_MESSAGES - Message class for ARun ITA 
Message number: 013
Message text: Cannot &3 order/item &1 as stock source is different from L
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The SAP error message ARUN_ITA_MESSAGES013 indicates that there is an issue with the stock source for a specific order or item. The message states that the order/item cannot be processed because the stock source is different from what is expected (in this case, it mentions "L", which typically refers to a specific stock type or location).
Cause: Stock Source Mismatch: The error usually occurs when the system is trying to process an order or item that requires stock from a specific source (like a storage location or stock type), but the stock available is from a different source.
Configuration Issues: There may be configuration settings in the system that define how stock sources are determined for orders, and these may not align with the current stock situation. Data Entry Errors: Incorrect data entry when creating the order or item can lead to mismatches in expected stock sources. Stock Type Restrictions: Certain stock types may have
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