when insert a duplicate key into map, it will be ingored. can update key value when insert a duplicate key into map? this is useful when update `logical_switch_port` table `external_ids` column. for example, ``` // lsp.ExternalIDs should be map[ key:value ] mutations := model.Mutation{ Field: &lsp.ExternalIDs, Value: map[string]string{"key": "value"}, Mutator: ovsdb.MutateOperationInsert, } ops, err := c.ovnNbClient.Where(lsp).Mutate(lsp, mutations) if err != nil { return err } if err := c.Transact("ls-set-external-ids", ops); err != nil { return err } // insert `key` repeatedly, lsp.ExternalIDs should be map[ key:value1 ] mutations := model.Mutation{ Field: &lsp.ExternalIDs, Value: map[string]string{"key": "value1"}, Mutator: ovsdb.MutateOperationInsert, } ```