How To Fix DT903 - &-structure: invalid change: length of field & was changed

DT903 - Overview

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 903

• Message text: &-structure: invalid change: length of field & was changed

What causes this issue?

For a BAPI or IDOC structure, you have attempted to change the length of
a field. The structure, however, is marked as "frozen". This means that,
in this version, it is delivered as productive in BAPIs and IDOCs,
respectively. Renewed delivery with the peformed change would contradict
the agreed interface.

System Response

The activation is rejected.

How to fix this error?

Take back the change. If it is absolutely necessary, you wil first have
to reset the "frozen" status. For information on how to do this and what
you need to watch out for, refer to Note 1297242.

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 DT903 - &-structure: invalid change: length of field & was changed ?

  The SAP error message DT903, which states "Structure: invalid change: length of field & was changed," typically occurs when there is an inconsistency in the data dictionary definitions of a structure. This error is often encountered during the activation of a data dictionary object, such as a structure or table, when the length of a field in the structure has been modified in a way that is not compatible with existing references to that structure.
  
  Cause:
  
  Field Length Change: The most common cause of this error is that the length of a field in a structure has been changed after it has already been used in other database objects (like tables, views, or other structures).
  Inconsistent References: If the structure is being used in multiple places, changing the length of a field can lead to inconsistencies, as existing references may not be able to accommodate the new length.
  Transport Issues: If the structure was