Upgrading from 2.2.x to 2.4.x(cent os 5, mysql 4.1.18) I ran into some errors during the db upgrade for mysql for 2.2 to 2.3 The first error was on line 4 for the statement ALTER TABLE sla DROP FOREIGN KEY FK_sla_service_id_id; Gave the "error of rename of dbname\sla to #sql2-25000-b" And then every alter statement below that tried to add a constraint also gave back an error cannot create table \dbname\#sql - 2500_b.frm....can I just safely ignore this?...i have rolled everything back to how it was with 2.2, but would love to complete the upgrade process.... ALTER TABLE ticket_watcher ADD CONSTRAINT FK_ticket_watcher_ticket_id_id FOREIGN KEY (ticket_id) REFERENCES ticket (id); ALTER TABLE ticket_watcher ADD CONSTRAINT FK_ticket_watcher_user_id_id FOREIGN KEY (user_id) REFERENCES users (id); ALTER TABLE ticket_watcher ADD CONSTRAINT FK_ticket_watcher_create_by_id FOREIGN KEY (create_by) REFERENCES users (id); ALTER TABLE ticket_watcher ADD CONSTRAINT FK_ticket_watcher_change_by_id FOREIGN KEY (change_by) REFERENCES users (id); ALTER TABLE queue_preferences ADD CONSTRAINT FK_queue_preferences_queue_id_id FOREIGN KEY (queue_id) REFERENCES queue (id); ALTER TABLE service_sla ADD CONSTRAINT FK_service_sla_service_id_id FOREIGN KEY (service_id) REFERENCES service (id); ALTER TABLE service_sla ADD CONSTRAINT FK_service_sla_sla_id_id FOREIGN KEY (sla_id) REFERENCES sla (id); ALTER TABLE link_type ADD CONSTRAINT FK_link_type_create_by_id FOREIGN KEY (create_by) REFERENCES users (id); ALTER TABLE link_type ADD CONSTRAINT FK_link_type_change_by_id FOREIGN KEY (change_by) REFERENCES users (id); ALTER TABLE link_type ADD CONSTRAINT FK_link_type_valid_id_id FOREIGN KEY (valid_id) REFERENCES valid (id); ALTER TABLE link_state ADD CONSTRAINT FK_link_state_create_by_id FOREIGN KEY (create_by) REFERENCES users (id); ALTER TABLE link_state ADD CONSTRAINT FK_link_state_change_by_id FOREIGN KEY (change_by) REFERENCES users (id); ALTER TABLE link_state ADD CONSTRAINT FK_link_state_valid_id_id FOREIGN KEY (valid_id) REFERENCES valid (id); ALTER TABLE link_relation ADD CONSTRAINT FK_link_relation_source_object_id_id FOREIGN KEY (source_object_id) REFERENCES link_object (id); ALTER TABLE link_relation ADD CONSTRAINT FK_link_relation_target_object_id_id FOREIGN KEY (target_object_id) REFERENCES link_object (id); ALTER TABLE link_relation ADD CONSTRAINT FK_link_relation_state_id_id FOREIGN KEY (state_id) REFERENCES link_state (id); ALTER TABLE link_relation ADD CONSTRAINT FK_link_relation_type_id_id FOREIGN KEY (type_id) REFERENCES link_type (id); ALTER TABLE link_relation ADD CONSTRAINT FK_link_relation_create_by_id FOREIGN KEY (create_by) REFERENCES users (id); ALTER TABLE article_search ADD CONSTRAINT FK_article_search_article_sender_type_id_id FOREIGN KEY (article_sender_type_id) REFERENCES article_sender_type (id); ALTER TABLE article_search ADD CONSTRAINT FK_article_search_article_type_id_id FOREIGN KEY (article_type_id) REFERENCES article_type (id); ALTER TABLE article_search ADD CONSTRAINT FK_article_search_ticket_id_id FOREIGN KEY (ticket_id) REFERENCES ticket (id);