How To Fix CR021 - A standard value key is required for use in task lists

CR021 - Overview

• Message type: E = Error

• Message class: CR - (1,099) Work Center; (100,200) Capacity

• Message number: 021

• Message text: A standard value key is required for use in task lists

What causes this issue?

When you defined the usage, you specified in which task lists you may
use the work center. If you enter a usage, you must also maintain the
standard value key.

Error message extract from SAP system. Copyright SAP SE.

CR021 - Details

• The SAP error message CR021, which states "A standard value key is required for use in task lists," typically occurs in the context of production planning and control, particularly when working with task lists in the SAP system. This error indicates that a standard value key, which is necessary for defining the standard times for operations in a task list, is missing or not properly assigned.
  
  Cause:
  
  Missing Standard Value Key: The most common cause of this error is that the task list (such as a routing or a production order) does not have a standard value key assigned to its operations.
  Incorrect Configuration: The standard value key may not be configured correctly in the system, or it may not exist in the database.
  Task List Type: The type of task list being used may require a standard value key that has not been defined.
  
  
  Solution:
  
  
  Assign a Standard Value Key:
  
  Go to the task list (routing