Update modules/ROOT/pages/authentication-authorization/manage-roles.adoc

Co-authored-by: Phil Wright <[email protected]>

Author: renetapopova

modules/ROOT/pages/authentication-authorization/manage-roles.adoc

@@ -587,7 +587,7 @@ The `CREATE OR REPLACE ROLE` command does not allow you to use the `IF NOT EXIST
 == Immutable roles
 
 Immutable roles are those that cannot be modified in the usual way.
-This means they cannot be created, renamed, dropped, or have privileges granted to or revoked from them.
+This means they cannot be created, renamed, dropped, or have privileges granted to or revoked from them under normal operating conditions.
 See xref:authentication-authorization/immutable-roles-privileges.adoc[Immutable roles and privileges] for details.
 
 They are useful in cases where you need a permanent built-in system role that cannot be modified even by users who have xref:authentication-authorization/dbms-administration.adoc#access-control-dbms-administration-role-management[`ROLE MANAGEMENT` privileges].