How To Fix DB719 - & is not a valid variable type

DB719 - Overview

• Message type: E = Error

• Message class: DB - Messages for logical databases and background processing

• Message number: 719

• Message text: & is not a valid variable type

What causes this issue?

You entered &V1& as variable type, but the only valid variable types
are "T" (variable from table TVARV), "D" (Dictionary field) and "F"
(function module).

System Response

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

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

DB719 - Details

• The SAP error message DB719 typically indicates that there is an issue with the data type of a variable being used in a database operation, such as a query or a data manipulation statement. This error can occur in various contexts, such as ABAP programming, database views, or when working with database tables.
  
  Cause:
  
  Invalid Data Type: The variable being referenced may not be of a valid type that the database can recognize or process. This can happen if the variable is not properly defined or if there is a mismatch between the expected data type and the actual data type.
  Database Schema Changes: If there have been changes to the database schema (e.g., changes in table definitions, data types, etc.), it may lead to this error if the code is not updated accordingly.
  Incorrect Variable Declaration: The variable may not be declared correctly in the ABAP program or may be using a type