I screwed up the SQL. Table three should have looked like:
CREATE TABLE [MEDD].[dbo].[TBL_IMPLEMENTATIONS_LOG_TABLES](
[TABLE_USED_ID] int IDENTITY(1,1) NOT NULL Primary Key,
[CHANGE_NUMBER] int FOREIGN KEY REFERENCES [dbo].[TBL_IMPLEMENTATIONS_LOG]([CHANGE_NUMBER]),
[SERVER_USED_ID] ...