Musisz mieć te tabele, to schemat tabel w ipb 3:
mysql> show tables;
+-------------------------------+
| Tables_in_ipb3 |
+-------------------------------+
| ipb_admin_login_logs |
| ipb_admin_logs |
| ipb_admin_permission_rows |
| ipb_announcements |
| ipb_api_log |
| ipb_api_users |
| ipb_attachments |
| ipb_attachments_type |
| ipb_backup_log |
| ipb_backup_queue |
| ipb_backup_vars |
| ipb_badwords |
| ipb_banfilters |
| ipb_bbcode_mediatag |
| ipb_bulk_mail |
| ipb_cache_simple |
| ipb_cache_store |
| ipb_captcha |
| ipb_content_cache_posts |
| ipb_content_cache_sigs |
| ipb_core_applications |
| ipb_core_archive_log |
| ipb_core_archive_restore |
| ipb_core_archive_rules |
| ipb_core_editor_autosave |
| ipb_core_geolocation_cache |
| ipb_core_hooks |
| ipb_core_hooks_files |
| ipb_core_incoming_email_log |
| ipb_core_incoming_emails |
| ipb_core_inline_messages |
| ipb_core_item_markers |
| ipb_core_item_markers_storage |
| ipb_core_like |
| ipb_core_like_cache |
| ipb_core_rss_imported |
| ipb_core_share_links |
| ipb_core_share_links_log |
| ipb_core_soft_delete_log |
| ipb_core_sys_bookmarks |
| ipb_core_sys_conf_settings |
| ipb_core_sys_cp_sessions |
| ipb_core_sys_lang |
| ipb_core_sys_lang_words |
| ipb_core_sys_login |
| ipb_core_sys_module |
| ipb_core_sys_settings_titles |
| ipb_core_tags |
| ipb_core_tags_cache |
| ipb_core_tags_perms |
| ipb_core_uagent_groups |
| ipb_core_uagents |
| ipb_custom_bbcode |
| ipb_dnames_change |
| ipb_emoticons |
| ipb_error_logs |
| ipb_faq |
| ipb_forum_perms |
| ipb_forums |
| ipb_forums_archive_posts |
| ipb_forums_recent_posts |
| ipb_groups |
| ipb_ignored_users |
| ipb_inline_notifications |
| ipb_login_methods |
| ipb_mail_error_logs |
| ipb_mail_queue |
| ipb_member_status_actions |
| ipb_member_status_replies |
| ipb_member_status_updates |
| ipb_members |
| ipb_members_partial |
| ipb_members_warn_actions |
| ipb_members_warn_logs |
| ipb_members_warn_reasons |
| ipb_message_posts |
| ipb_message_topic_user_map |
| ipb_message_topics |
| ipb_mobile_app_style |
| ipb_mobile_device_map |
| ipb_mobile_notifications |
| ipb_mod_queued_items |
| ipb_moderator_logs |
| ipb_moderators |
| ipb_permission_index |
| ipb_pfields_content |
| ipb_pfields_data |
| ipb_pfields_groups |
| ipb_polls |
| ipb_posts |
| ipb_profile_friends |
| ipb_profile_friends_flood |
| ipb_profile_portal |
| ipb_profile_portal_views |
| ipb_profile_ratings |
| ipb_question_and_answer |
| ipb_rc_classes |
| ipb_rc_comments |
| ipb_rc_modpref |
| ipb_rc_reports |
| ipb_rc_reports_index |
| ipb_rc_status |
| ipb_rc_status_sev |
| ipb_reputation_cache |
| ipb_reputation_index |
| ipb_reputation_levels |
| ipb_reputation_totals |
| ipb_rss_export |
| ipb_rss_import |
| ipb_rss_imported |
| ipb_search_keywords |
| ipb_search_sessions |
| ipb_search_visitors |
| ipb_seo_acronyms |
| ipb_seo_meta |
| ipb_sessions |
| ipb_skin_cache |
| ipb_skin_collections |
| ipb_skin_css |
| ipb_skin_css_previous |
| ipb_skin_generator_sessions |
| ipb_skin_merge_changes |
| ipb_skin_merge_session |
| ipb_skin_replacements |
| ipb_skin_templates |
| ipb_skin_templates_cache |
| ipb_skin_templates_previous |
| ipb_skin_url_mapping |
| ipb_spam_service_log |
| ipb_spider_logs |
| ipb_tags_index |
| ipb_task_logs |
| ipb_task_manager |
| ipb_template_sandr |
| ipb_titles |
| ipb_topic_mmod |
| ipb_topic_ratings |
| ipb_topic_views |
| ipb_topics |
| ipb_twitter_connect |
| ipb_upgrade_history |
| ipb_upgrade_sessions |
| ipb_validating |
| ipb_voters |
| ipb_warn_logs |
+-------------------------------+
145 rows in set (0.00 sec)
Oczywiście, prefix "ipb_" może się różnić.
Jeżeli nie masz któryś tabel, to widocznie korzystasz z innej bazy danych.