Field contains invalid characters

What causes this issue?

You can only use certain characters when specifying a Distinguished
Name. These are the letters A-Z und a-z, the digits 0-9, and three
special characters: "*", "." and "-". If you enclose the value of the
affected attribute in the Distinguished Name in quotation marks ("),
you can also use the characters "+", "<", ">", "&", ";", and ",".
Alternatively, you can enter special characters using "\ab", where "ab"
is the hexadecimal code of the character in UTF8 representation.

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?

Specify a valid version of the desired entry or choose a different
Distinguished Name.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.