The model backing the 'ApplicationDbContext' context has changed since the database was created

Question

First of all, I have not seen this error anywhere else and I guess it\'s not a replicate so please read the whole situation first.

Everything was working just fine

Answer 1

Just in case anyone else stumbles upon this that was doing a database first implementation like me.

I made a change by extending the ApplicationUser class, adding a new field to the AspNetUsers table, and then had this error on startup.

I was able to resolve this by deleting the record created in the __MigrationHistory table (there was only one record there) I assume EF decided that I needed to update my database using the migration tool - but I had already done this manually myself.

Answer 2

Deleting Rows in [__MigrationHistory] table with Older productVersion worked for me. This answer is for those who don't want to delete entire [__MigrationHistory] table. Just delete the rows with older version in ProductVersion Column. Hope it helps some one!

Answer 3

Below was the similar kind of error i encountered

The model backing the 'PsnlContext' context has changed since the database was created. Consider using Code First Migrations to update the database (http://go.microsoft.com/fwlink/?LinkId=238269).

I added the below section in the Application Start event of the Global.asax to solve the error

Database.SetInitializer (null);

This fixed the issue

Answer 4

If you delete the "[__MigrationHistory]" table from your "database > System Tables" then it will work.

Answer 5

I just solved a similar problem by deleting all files in the website folder and then republished it.

Answer 6

Delete existing db ,create new db with same name , copy all data...it will work