TITLE: GCN CIRCULAR NUMBER: 30184 SUBJECT: GRB 210610B: correction to GCN 30181 DATE: 21/06/10 23:44:58 GMT FROM: Filipp Dmitrievich Romanov at Amateur astronomer Instead "the field of GRB 201223A" meant "the field of GRB 210610B": this line was copied from my observation of the optical afterglow of GRB 201223A (GCN Circular #29165) with the same telescope.