Cannot truncate table 'dbo.Users' because it is being referenced by a FOREIGN KEY constraint. code example
Example: Cannot truncate a table referenced in a foreign key constraint (`video_clips`.`channel_clips`, CONSTRAINT `clips_fk` FOREIGN KEY (`clip_id`) REFERENCES `video_clips`.`clips` (`id`)) in sql]
SET FOREIGN_KEY_CHECKS = 0;
truncate table "yourTableName";
SET FOREIGN_KEY_CHECKS = 1;