SQL Server - Create Table script not working - sql-server

Question

Trying to add a table to my database in SQL Server Management Studio but it's throwing a wobbly. I'm sure it's real simple but my brain has gone to mush and I can't find the problem. Basically it's telling me the database already exists, yet it clearly doesn't.
Error(s):
Msg 3701, Level 11, State 5, Line 2
Cannot drop the table 'MySchema.mix_Case_Study-Module', because it does not exist or you do not have permission.
Msg 2714, Level 16, State 5, Line 4
There is already an object named 'mix_Case_Study-Module' in the database.
Msg 1750, Level 16, State 0, Line 4
Could not create constraint. See previous errors.
Msg 4902, Level 16, State 1, Line 2
Cannot find the object "MySchema.mix_Case_Study-Module" because it does not exist or you do not have permissions.
SQL:
USE [MyDB]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
DROP TABLE [MySchema].[mix_Case_Study-Module]
CREATE TABLE [MySchema].[mix_Case_Study-Module](
[ID] [int] IDENTITY(1,1) NOT NULL,
[Active] [bit] NOT NULL,
[Case Study ID] [int] NOT NULL,
[Module ID] [int] NOT NULL,
[Position] [int] NOT NULL,
CONSTRAINT [mix_Case_Study-Module] PRIMARY KEY CLUSTERED (
[ID] ASC
) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, FILLFACTOR = 90) ON [PRIMARY]
) ON [PRIMARY]
GO
ALTER TABLE [MySchema].[mix_Case_Study-Module] ADD CONSTRAINT [DF_mix_Case_Study-Module_Active] DEFAULT ((1)) FOR [Active]
GO
Any help appreciated.

Answer 1

Your constraint name and table name are the same.
CREATE TABLE [MySchema].[mix_Case_Study-Module]
and
CONSTRAINT [mix_Case_Study-Module] PRIMARY KEY CLUSTERED

Answer 2

You are having issues because you're first trying to drop a table that does not exist.
You should be using something like this:
USE [MyDB]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
IF OBJECT_ID([MySchema].[mix_Case_Study-Module], 'u') IS NOT NULL
DROP TABLE [MySchema].[mix_Case_Study-Module]
CREATE TABLE [MySchema].[mix_Case_Study-Module](
[ID] [int] IDENTITY(1,1) NOT NULL,
[Active] [bit] NOT NULL,
[Case Study ID] [int] NOT NULL,
[Module ID] [int] NOT NULL,
[Position] [int] NOT NULL,
CONSTRAINT [mix_Case_Study-Module_PK] PRIMARY KEY CLUSTERED (
[ID] ASC
) WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, FILLFACTOR = 90) ON [PRIMARY]
) ON [PRIMARY]
GO
ALTER TABLE [MySchema].[mix_Case_Study-Module] ADD CONSTRAINT [DF_mix_Case_Study-Module_Active] DEFAULT ((1)) FOR [Active]
GO