How To Fix IUUC_MAIN054 - Table &1 already has 16 key fields

IUUC_MAIN054 - Overview

• Message type: E = Error

• Message class: IUUC_MAIN - IUUC: Main Message class

• Message number: 054

• Message text: Table &1 already has 16 key fields

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message IUUC_MAIN054 - Table &1 already has 16 key fields ?

  The SAP error message IUUC_MAIN054 indicates that a table you are trying to create or modify already has the maximum allowed number of key fields, which is 16. This is a limitation in the SAP database structure, as a table can only have a maximum of 16 key fields (primary key fields).
  
  Cause:
  The error occurs when you attempt to add more key fields to a table that already has 16 key fields defined. This can happen during the creation of a new table, modification of an existing table, or when trying to replicate or synchronize data between systems.
  
  Solution:
  To resolve this error, you can consider the following approaches:
  
  
  Review Key Fields: Check the existing key fields of the table. Determine if all of them are necessary. If some key fields are not essential for uniquely identifying records, consider removing them.
  
  
  Composite Keys: If applicable, you might be able to use composite keys (a combination