How To Fix DD_DBAL034 - Table &1, field &2: Type change from &3 to &4 not supported

DD_DBAL034 - Overview

• Message type: E = Error

• Message class: DD_DBAL - ABAP Dictionary, Data Base Abstraction Layer

• Message number: 034

• Message text: Table &1, field &2: Type change from &3 to &4 not supported

Self-Explanatory Message

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DD_DBAL034 - Details

• The SAP error message DD_DBAL034 indicates that there is an issue with a type change for a field in a database table. Specifically, it means that the system has detected an attempt to change the data type of a field in a way that is not supported. This can occur during various operations, such as when you are trying to modify a table structure or during a transport of changes.
  
  Cause:
  The error typically arises from one of the following scenarios:
  
  Incompatible Data Type Change: You are trying to change a field's data type to a type that is incompatible with its current type. For example, changing a field from a numeric type to a character type or vice versa.
  Database Constraints: The underlying database may have constraints that prevent certain type changes.
  Data Loss Risk: The change may lead to potential data loss or corruption, which the system is designed to prevent.
  
  
  Solution:
  To resolve this