Fix auto-increment WordPress database and duplicate entry. source: https://www.codegrepper.com/code-examples/whatever/fix+autoincrement+wordpress+database

wp_migration.sql

DELETE FROM wp_termmeta  WHERE meta_id=0;
DELETE FROM wp_terms  WHERE term_id=0;
DELETE FROM wp_term_taxonomy  WHERE term_taxonomy_id=0;
DELETE FROM wp_commentmeta  WHERE meta_id=0;
DELETE FROM wp_comments  WHERE comment_ID=0;
DELETE FROM wp_links  WHERE link_id=0;
DELETE FROM wp_options  WHERE option_id=0;
DELETE FROM wp_postmeta  WHERE meta_id=0;
DELETE FROM wp_users  WHERE ID=0;
DELETE FROM wp_posts  WHERE ID=0;
DELETE FROM wp_usermeta  WHERE umeta_id=0;

ALTER TABLE  wp_termmeta ADD PRIMARY KEY(meta_id);
ALTER TABLE  wp_terms ADD PRIMARY KEY(term_id);
ALTER TABLE  wp_term_taxonomy ADD PRIMARY KEY(term_taxonomy_id);
ALTER TABLE  wp_commentmeta ADD PRIMARY KEY(meta_id);
ALTER TABLE  wp_comments ADD PRIMARY KEY(comment_ID);
ALTER TABLE  wp_links ADD PRIMARY KEY(link_id);
ALTER TABLE  wp_options ADD PRIMARY KEY(option_id);
ALTER TABLE  wp_postmeta ADD PRIMARY KEY(meta_id);
ALTER TABLE  wp_users ADD PRIMARY KEY(ID);
ALTER TABLE  wp_posts ADD PRIMARY KEY(ID);
ALTER TABLE  wp_usermeta ADD PRIMARY KEY(umeta_id);

ALTER TABLE wp_termmeta CHANGE meta_id meta_id  BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT;
ALTER TABLE wp_terms CHANGE term_id term_id  BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT;
ALTER TABLE wp_term_taxonomy CHANGE term_taxonomy_id term_taxonomy_id  BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT;
ALTER TABLE wp_commentmeta CHANGE meta_id meta_id  BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT;
ALTER TABLE wp_comments CHANGE comment_ID comment_ID  BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT;
ALTER TABLE wp_links CHANGE link_id link_id  BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT;
ALTER TABLE wp_options CHANGE option_id option_id  BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT;
ALTER TABLE wp_postmeta CHANGE meta_id meta_id  BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT;
ALTER TABLE wp_users CHANGE ID ID  BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT;
ALTER TABLE wp_posts CHANGE ID ID  BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT;
ALTER TABLE wp_usermeta CHANGE umeta_id umeta_id  BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT;