Message type: E = Error
Message class:  SLS_TEMPLATE - Messages for sales template 
Message number: 023
Message text: Sales template with key '&1' does already exist and is being changed
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The SAP error message SLS_TEMPLATE023 indicates that there is an attempt to create or modify a sales template that already exists in the system. The message typically includes a key (represented as &1) that identifies the specific sales template in question.
Cause: The error occurs when: You are trying to create a new sales template with a key that already exists in the system. You are attempting to change an existing sales template, but the system detects that the template is already being modified or is locked by another user or process.
Solution: To resolve this error, you can take the following steps: Check Existing Templates: Use transaction codes like VA01 (Create Sales Order) or VA02 (Change Sales Order) to check if the sales template with the specified key already exists. You can also use transaction SLS1 (Sales Template Management) to view existing templates. Modify or Delete Existing Template: If the template exists and you need to make changes, consider modifying
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