How To Fix /IWBEP/CM_V4_APPS017 - The request has to be conditional (ETag required)

/IWBEP/CM_V4_APPS017 - Overview

• Message type: E = Error

• Message class: /IWBEP/CM_V4_APPS -

• Message number: 017

• Message text: The request has to be conditional (ETag required)

Self-Explanatory Message

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/IWBEP/CM_V4_APPS017 - Details

• The SAP error message /IWBEP/CM_V4_APPS017 indicates that a request made to an OData service is missing an ETag, which is required for conditional requests. ETags are used for cache validation and to ensure that the client is working with the most recent version of a resource.
  
  Cause:
  The error typically occurs in the following scenarios:
  
  Missing ETag: The client did not include the ETag in the request headers when it was expected.
  Incorrect Request Type: The request type (e.g., PUT, PATCH, DELETE) requires an ETag for conditional processing, but it was not provided.
  Service Configuration: The OData service may be configured to require ETags for certain operations, and the client is not adhering to this requirement.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Include ETag in Request:
  
  When making a request that modifies a resource (like PUT or DELETE), ensure that you include the If-Match header with the ETag value. The ETag can usually be