Running a db check on zabbix db via phpmyadmin warns of an issue with indexes

SQL query:
CHECK TABLE `acknowledges`, `actions`, `alerts`, `applications`, `auditlog`, `auditlog_details`, `autoreg_host`, `conditions`, `config`, `dchecks`, `dhosts`, `drules`, `dservices`, `escalations`, `events`, `expressions`, `functions`, `globalmacro`, `graphs`, `graphs_items`, `graph_theme`, `groups`, `help_items`, `history`, `history_log`, `history_str`, `history_str_sync`, `history_sync`, `history_text`, `history_uint`, `history_uint_sync`, `hostmacro`, `hosts`, `hosts_groups`, `hosts_profiles`, `hosts_profiles_ext`, `hosts_templates`, `housekeeper`, `httpstep`, `httpstepitem`, `httptest`, `httptestitem`, `ids`, `images`, `items`, `items_applications`, `maintenances`, `maintenances_groups`, `maintenances_hosts`, `maintenances_windows`, `mappings`, `media`, `media_type`, `nodes`, `node_cksum`, `opconditions`, `operations`, `opmediatypes`, `profiles`, `proxy_autoreg_host`, `proxy_dhistory`, `proxy_history`, `regexps`, `rights`, `screens`, `screens_items`, `scripts`, `services`, `services_[...]

Problems with indexes of table `history_str_sync`
The following indexes appear to be equal and one of them should be removed: PRIMARY, id
Problems with indexes of table `history_sync`
The following indexes appear to be equal and one of them should be removed: PRIMARY, id
Problems with indexes of table `history_uint_sync`
The following indexes appear to be equal and one of them should be removed: PRIMARY, id
Problems with indexes of table `proxy_autoreg_host`
The following indexes appear to be equal and one of them should be removed: PRIMARY, id
Problems with indexes of table `proxy_dhistory`
The following indexes appear to be equal and one of them should be removed: PRIMARY, id
Problems with indexes of table `proxy_history`
The following indexes appear to be equal and one of them should be removed: PRIMARY, id