There needs to be a primary key

[jewpaltz]

https://github.com/SoGucci/WebProgramming2020/blob/4cbf36ebf8cde0835740af28acf7d913f5136566/server/sql9374195-2.sql#L31

From years of experience I've learned that it is almost always best practice to have an autoincrementing number or some such field on every table to act as pk. Even tables that are just connection tables, or where a natural key already exists.

So same goes for followers