How To Fix UMG302 - Some tables exist in the Default Exception List already.

SAP Error Message - Details

• Message type: E = Error

• Message class: UMG - Message Class for the Unicode Migration Tool.

• Message number: 302

• Message text: Some tables exist in the Default Exception List already.

What causes this issue?

You tried to insert tables into the Customer Exception List. But some of
the tables exist already in the Default Exception List delivered by
SAP.

System Response

Only tables which are not in the Default Exception List have been
inserted into the Customer Exception List.

How to fix this error?

If you want to change the settings for a table in the Default Exception
List, you have to delete it first from the Default Exception List. After
wards you can insert the table into the Customer Exception List.

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.