I created a new list wih a custom field on the same campaign, and it occurs the same.
Please, I need to solved this.

MariaDB [mysql]> use asterisk;
Database changed
MariaDB [asterisk]> show tables;
+--------------------------------------+
| Tables_in_asterisk |
+--------------------------------------+
| call_log |
| call_log_archive |
| callcard_accounts |
| callcard_accounts_details |
| callcard_log |
| conferences |
| contact_information |
| custom_1001 |
| custom_1002 |
| custom_1004 |
| custom_2001 |
| custom_8756294 |
| custom_997 |
| dialable_inventory_snapshots |
| groups_alias |
| inbound_email_attachments |
| inbound_numbers |
| live_channels |
| live_inbound |
| live_inbound_log |
| live_sip_channels |
| park_log |
| parked_channels |
| phone_favorites |
| phones |
| phones_alias |
| recording_log |
| server_performance |
| server_updater |
| servers |
| system_settings |
| twoday_call_log |
| twoday_recording_log |
| twoday_vicidial_agent_log |
| twoday_vicidial_closer_log |
| twoday_vicidial_log |
| twoday_vicidial_xfer_log |
| user_call_log |
| vicibox |
| vicidial_admin_log |
| vicidial_agent_log |
| vicidial_agent_log_archive |
| vicidial_agent_skip_log |
| vicidial_agent_sph |
| vicidial_api_log |
| vicidial_auto_calls |
| vicidial_call_menu |
| vicidial_call_menu_options |
| vicidial_call_notes |
| vicidial_call_notes_archive |
| vicidial_call_time_holidays |
| vicidial_call_times |
| vicidial_callbacks |
| vicidial_campaign_agents |
| vicidial_campaign_cid_areacodes |
| vicidial_campaign_dnc |
| vicidial_campaign_hotkeys |
| vicidial_campaign_server_stats |
| vicidial_campaign_stats |
| vicidial_campaign_stats_debug |
| vicidial_campaign_statuses |
| vicidial_campaigns |
| vicidial_campaigns_list_mix |
| vicidial_carrier_log |
| vicidial_carrier_log_archive |
| vicidial_closer_log |
| vicidial_closer_log_archive |
| vicidial_comments |
| vicidial_conf_templates |
| vicidial_conferences |
| vicidial_configuration |
| vicidial_cpd_log |
| vicidial_custom_cid |
| vicidial_custom_leadloader_templates |
| vicidial_daily_max_stats |
| vicidial_daily_ra_stats |
| vicidial_dial_log |
| vicidial_dial_log_archive |
| vicidial_did_agent_log |
| vicidial_did_agent_log_archive |
| vicidial_did_log |
| vicidial_did_ra_extensions |
| vicidial_dnc |
| vicidial_drop_rate_groups |
| vicidial_email_accounts |
| vicidial_email_list |
| vicidial_email_log |
| vicidial_extension_groups |
| vicidial_filter_phone_groups |
| vicidial_filter_phone_numbers |
| vicidial_grab_call_log |
| vicidial_hopper |
| vicidial_inbound_dids |
| vicidial_inbound_group_agents |
| vicidial_inbound_groups |
| vicidial_ivr |
| vicidial_lead_filters |
| vicidial_lead_recycle |
| vicidial_lead_search_log |
| vicidial_lead_search_log_archive |
| vicidial_list |
| vicidial_list_alt_phones |
| vicidial_list_pins |
| vicidial_list_update_log |
| vicidial_lists |
| vicidial_lists_custom |
| vicidial_lists_fields |
| vicidial_live_agents |
| vicidial_live_inbound_agents |
| vicidial_log |
| vicidial_log_archive |
| vicidial_log_extended |
| vicidial_log_extended_archive |
| vicidial_log_noanswer |
| vicidial_log_noanswer_archive |
| vicidial_manager |
| vicidial_manual_dial_queue |
| vicidial_monitor_calls |
| vicidial_monitor_log |
| vicidial_music_on_hold |
| vicidial_music_on_hold_files |
| vicidial_nanpa_prefix_codes |
| vicidial_outbound_ivr_log |
| vicidial_outbound_ivr_log_archive |
| vicidial_override_ids |
| vicidial_pause_codes |
| vicidial_phone_codes |
| vicidial_postal_codes |
| vicidial_process_trigger_log |
| vicidial_process_triggers |
| vicidial_qc_agent_log |
| vicidial_qc_codes |
| vicidial_remote_agent_log |
| vicidial_remote_agents |
| vicidial_report_log |
| vicidial_screen_labels |
| vicidial_scripts |
| vicidial_server_carriers |
| vicidial_server_trunks |
| vicidial_session_data |
| vicidial_shifts |
| vicidial_state_call_times |
| vicidial_stations |
| vicidial_status_categories |
| vicidial_statuses |
| vicidial_territories |
| vicidial_timeclock_audit_log |
| vicidial_timeclock_log |
| vicidial_timeclock_status |
| vicidial_tts_prompts |
| vicidial_url_log |
| vicidial_user_closer_log |
| vicidial_user_groups |
| vicidial_user_log |
| vicidial_user_territories |
| vicidial_user_territory_log |
| vicidial_users |
| vicidial_voicemail |
| vicidial_xfer_log |
| vicidial_xfer_presets |
| vicidial_xfer_stats |
| vtiger_rank_data |
| vtiger_rank_parameters |
| vtiger_vicidial_roles |
| web_client_sessions |
+--------------------------------------+
MariaDB [asterisk]> describe custom_8756294;
+---------+-----------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+---------+-----------------+------+-----+---------+-------+
| lead_id | int(9) unsigned | NO | PRI | NULL | |
| uno | varchar(10) | YES | | NULL | |
+---------+-----------------+------+-----+---------+-------+
2 rows in set (0.00 sec)