Message type: E = Error
Message class:  DGHU - Messages for Handling Unit and Dynam. Classification 
Message number: 148
Message text: First fill in the key fields
You have not completed all of the relevant fields.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
If you want to save or generate, the fields 'Dangerous Goods
Classification' and at least 'Packaging Code' or 'Packing Material' (or
both) must be maintained for each line.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message DGHU148, which states "First fill in the key fields," typically occurs when a user attempts to execute a transaction or process without providing the necessary key fields that are required for the operation. This error is common in various SAP modules, particularly in areas related to data entry, master data maintenance, or transaction processing.
Cause: The primary cause of this error is that the required key fields (which are essential for identifying records or transactions) have not been filled in. Key fields are usually mandatory fields that uniquely identify a record in the database, such as document numbers, customer IDs, material numbers, etc.
Solution: To resolve the DGHU148 error, follow these steps: Identify Key Fields: Check the screen or transaction you are working on to identify which fields are marked as mandatory (often indicated by an asterisk or highlighted in some way). Fill in Required Fields: Ensure that all required key fields
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