How To Fix AQ121 - Name & is invalid

AQ121 - Overview

• Message type: E = Error

• Message class: AQ - Message texts for SAP Query

• Message number: 121

• Message text: Name & is invalid

What causes this issue?

You tried to give a query object (query, InfoSet or user group) a name
that does not comply with the naming conventions. This name either
contains an invalid name prefix, is an invalid name or contains invalid
characters.
Since the introduction of namespaces, objects in the global area can be
assigned to a namespace using a prefix with the form '/prefix/'. This
is optional. If you use a prefix, it may not be longer than 10
characters. The following rules apply to the names of query objects in
the global area:
Names of InfoSet have the form '/prefix/infoset'.
Names of user groups have the form '/prefix/user_group'.
Names of queries have the form 'query'. They inherit the prefix of
their user group and therefore may not have a prefix of their own.
For future query expansions all query object names are reserved that
begin with SY and contain more than four characters. Objects with these
kinds of names cannot be created using the maintenance transaction.
The names of query objects may not only consist of letters, digits and
the special characters - and _ (hyphen and underline).
The following cases lead to illegal names:
You use a prefix for an object in the standard area.
You use the prefix // or a prefix /.../ with more than 10 characters.
You assign a prefix to the name of a query.
You use a prefix that belongs to another customer.
There are no other characters after the prefix.
The name starts with SY and contains more than 4 characters.
The name contains an invalid special character.

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message AQ121 - Name & is invalid ?

  The SAP error message AQ121 ("Name & is invalid") typically occurs when there is an issue with the naming conventions or the validity of the name being used in a particular context within the SAP system. This error can arise in various scenarios, such as when creating or modifying objects like users, roles, or other entities.
  Causes:
  
  Invalid Characters: The name may contain invalid characters that are not allowed by SAP naming conventions.
  Length Restrictions: The name may exceed the maximum length allowed for that particular object.
  Reserved Names: The name may be a reserved keyword or already in use by another object.
  Incorrect Format: The name may not adhere to the required format (e.g., uppercase/lowercase requirements).
  Missing Required Fields: If the name is part of a larger form, other required fields may not be filled out correctly.
  
  Solutions:
  
  Check Naming Conventions: Ensure that the name adheres to SAP's naming conventions. Typically, names should consist of alphanumeric characters