How To Fix MC071 - Field &-& required as a key field

MC071 - Overview

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 071

• Message text: Field &-& required as a key field

What causes this issue?

You tried to delete a mandatory field.
Certain views and matchcode objects must contain at least all the
primary key fields of the included tables which are not simultaneously
foreign key fields.

System Response

You cannot delete the field.

How to fix this error?

Leave the mandatory fields in the view or matchcode object.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MC071 - Field &-& required as a key field ?

  The SAP error message MC071 ("Field &-& required as a key field") typically occurs in the context of Material Management (MM) or Production Planning (PP) modules when a required key field is missing in a transaction or data entry process. This error indicates that the system expects certain key fields to be filled in order to proceed with the operation, such as creating or updating a record.
  
  Cause:
  
  Missing Key Fields: The most common cause of this error is that one or more required key fields are not filled in the transaction screen. Key fields are essential for uniquely identifying records in the database.
  
  Configuration Issues: There may be configuration settings in the SAP system that define which fields are required for certain transactions, and these settings may not align with the data being entered.
  Data Entry Errors: Users may inadvertently skip fields or enter incorrect data types, leading to the system not recognizing