Message type: E = Error
Message class:  RETAIL_ST_PLA_MSG - RETAIL_ST_PLA_MSG 
Message number: 004
Message text: The key of entity &1 must be fully specified
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The SAP error message RETAIL_ST_PLA_MSG004 indicates that the key of the entity specified (denoted by &1) is not fully specified. This typically occurs in the context of SAP Retail, particularly when dealing with planning or master data entities.
Cause: The error usually arises when: Incomplete Key Specification: The key fields required to uniquely identify an entity (like a product, store, or planning object) are not fully provided. For example, if you are trying to access a product but have not specified all the necessary identifiers (like product ID, store ID, etc.). Data Entry Errors: There may be a mistake in the data entry process where some key fields are left blank or incorrectly filled.
Configuration Issues: The system might be misconfigured, leading to the requirement of additional key fields that are not being provided.
Solution: To resolve this error, you can take the following steps: Check Key Fields: Review the entity you are trying to access and ensure
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