How To Fix USMD1033 - Data model &1, entity type &2: Too many key fields

SAP Error Message - Details

• Message type: E = Error

• Message class: USMD1 - Datenmodel

• Message number: 033

• Message text: Data model &1, entity type &2: Too many key fields

What causes this issue?

The database tables to be generated - as well as the client - can
contain a maximum of 15 key fields. The system reserves two key fields
for edition-dependent master data. This results in the following
prerequisites for defining relationships with <LS>Leading</> or
<LS>Qualifying</> as the relationship type:
A maximum of 12 higher-level relationships with the relationship type
<LS>Leading</> (direct or indirect) can be defined for entity types with
<DS:DE.USMD_USAGE_TYPE>storage and use type</> <LS>1</>.
A maximum of 12 higher-level relationships with <LS>Leading</> or
<LS>Qualifying</> as the relationship type can be defined for entity
types with storage and use type <LS>4</>.
A maximum of 14 higher-level relationships with the relationship type
<LS>Leading</> (direct or indirect) can be defined for entity types with
storage and use type <LS>2</>.
These prerequisites are <ZH>not</> fulfilled for entity type &V2&.

System Response

The data model cannot be saved or activated.

How to fix this error?

Only define as many relationships as the prerequisites allow.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message USMD1033 - Data model &1, entity type &2: Too many key fields ?

  The SAP error message USMD1033 indicates that there are too many key fields defined for a specific data model and entity type in the SAP Master Data Governance (MDG) application. This error typically arises when the number of key fields exceeds the allowed limit set by the system.
  Cause:
  
  Exceeding Key Field Limit: Each entity type in SAP MDG has a predefined limit on the number of key fields that can be defined. If you attempt to define more key fields than allowed, this error will be triggered.
  Incorrect Configuration: The data model or entity type may have been incorrectly configured, leading to an excessive number of key fields being defined.
  Data Model Design: The design of the data model may not align with best practices, resulting in an unnecessary increase in key fields.
  
  Solution:
  
  Review Key Fields: Check the configuration of the data model and the specific entity type to identify the key fields that have been defined. Determine if all of them are necessary.
  Reduce Key Fields: If there are key fields that are not essential for uniquely identifying records, consider removing them from the key definition.
  Consult Documentation: Refer to SAP documentation or guidelines for the specific limits on key fields for the entity type you are working with.
  Adjust Data Model: If the data model design is flawed, consider redesigning it to better fit the requirements while adhering to the key field limits.
  Testing: After making changes, test the data model to ensure that it functions correctly and that the error no longer occurs.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or updates regarding this error message.
  MDG Configuration: Familiarize yourself with the configuration settings in SAP MDG, particularly those related to data models and entity types.
  Best Practices: Review best practices for designing data models in SAP MDG to avoid similar issues in the future.
  Community Forums: Engage with SAP community forums or support channels for additional assistance and shared experiences from other users who may have encountered the same issue.
  
  By following these steps, you should be able to resolve the USMD1033 error and ensure that your data model is correctly configured.