Mysql forward engineered sql duplicate foreign key constraints - mysql

Question

i don't know much SQLs, i generated this using modelling via MySQL Workbench. I always get a Error Code: 1826. Duplicate foreign key constraint name 'post_id' when i try to import the SQL generated via Forward Engineering of workbench. If anybody could me out. I am not coding this from scratch. I just made a ERD and generated an SQL.
Additional info, the error fires in this line
CREATE TABLE IF NOT EXISTS testing.post_likes ...
Also, MySQL Workbench and Server are both version 8.0.19
Here is the generated SQL
-- MySQL Script generated by MySQL Workbench
-- Tue Mar 31 21:51:19 2020
-- Model: New Model Version: 1.0
-- MySQL Workbench Forward Engineering
SET #OLD_UNIQUE_CHECKS=##UNIQUE_CHECKS, UNIQUE_CHECKS=0;
SET #OLD_FOREIGN_KEY_CHECKS=##FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0;
SET #OLD_SQL_MODE=##SQL_MODE, SQL_MODE='ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';
-- -----------------------------------------------------
-- Schema testing
-- -----------------------------------------------------
-- -----------------------------------------------------
-- Schema testing
-- -----------------------------------------------------
CREATE SCHEMA IF NOT EXISTS `testing` DEFAULT CHARACTER SET utf8 ;
USE `testing` ;
-- -----------------------------------------------------
-- Table `testing`.`users`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `testing`.`users` (
`userid` DOUBLE NOT NULL,
`username` VARCHAR(100) NULL,
`email` VARCHAR(100) NULL,
`name` VARCHAR(100) NULL,
`handle` VARCHAR(45) NULL,
`quote` LONGTEXT NULL,
`last_updated` DATE NULL,
PRIMARY KEY (`userid`))
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `testing`.`posts`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `testing`.`posts` (
`post_id` DOUBLE NOT NULL,
`user_id` DOUBLE NOT NULL,
`description` LONGTEXT NULL,
`images` LONGTEXT NULL,
`tags` LONGTEXT NULL,
`last_updated` DATE NULL,
PRIMARY KEY (`post_id`),
INDEX `user_id_idx` (`user_id` ASC) VISIBLE,
CONSTRAINT `user_id`
FOREIGN KEY (`user_id`)
REFERENCES `testing`.`users` (`userid`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `testing`.`comments`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `testing`.`comments` (
`comment_id` DOUBLE NOT NULL,
`post_id` DOUBLE NOT NULL,
`description` LONGTEXT NULL,
`images` LONGTEXT NULL,
`last_updated` DATE NULL,
PRIMARY KEY (`comment_id`),
INDEX `post_id_idx` (`post_id` ASC) VISIBLE,
CONSTRAINT `post_id`
FOREIGN KEY (`post_id`)
REFERENCES `testing`.`posts` (`post_id`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `testing`.`post_likes`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `testing`.`post_likes` (
`plike_id` DOUBLE NOT NULL,
`post_id` DOUBLE NOT NULL,
`user_id` DOUBLE NOT NULL,
`type` INT NULL,
PRIMARY KEY (`plike_id`),
INDEX `post_id_idx` (`post_id` ASC) VISIBLE,
INDEX `user_id_idx` (`user_id` ASC) VISIBLE,
CONSTRAINT `post_id`
FOREIGN KEY (`post_id`)
REFERENCES `testing`.`posts` (`post_id`)
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `user_id`
FOREIGN KEY (`user_id`)
REFERENCES `testing`.`users` (`userid`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
-- -----------------------------------------------------
-- Table `testing`.`comment_likes`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `testing`.`comment_likes` (
`clike_id` DOUBLE NOT NULL,
`comment_id` DOUBLE NOT NULL,
`user_id` DOUBLE NOT NULL,
`type` INT NULL,
PRIMARY KEY (`clike_id`),
INDEX `comment_id_idx` (`comment_id` ASC) VISIBLE,
INDEX `user_id_idx` (`user_id` ASC) VISIBLE,
CONSTRAINT `comment_id`
FOREIGN KEY (`comment_id`)
REFERENCES `testing`.`comments` (`comment_id`)
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `user_id`
FOREIGN KEY (`user_id`)
REFERENCES `testing`.`users` (`userid`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;
SET SQL_MODE=#OLD_SQL_MODE;
SET FOREIGN_KEY_CHECKS=#OLD_FOREIGN_KEY_CHECKS;
SET UNIQUE_CHECKS=#OLD_UNIQUE_CHECKS;

Answer 1

As per discussion with #P.Salmon, it was indicated that the FK name was duplicated. So i adjusted the FK name via the ERD ang generated a new SQL file. So basically, i adjusted avoid using the same FK name and voila, it works.
See below