hey guys,

after attaching the local db (Umbraco.mdf) located in the app folder to management studio, in order to study the table structures and so on, I am not able to run my local instance anymore, getting the error:

"Boot failed: Umbraco cannot run. See Umbraco's log file for more details.

-> Umbraco.Core.Exceptions.BootFailedException: A connection string is configured but Umbraco could not connect to the database."

finally i think i found out the reason behind this. I tried to connect to the mdf db by using the built in server explorer in VS 2019. There I got an exception with more information:

the database mdf cannot be opened because it is version 869. this server supports version 852

Well version 869 is related to sql server 2017, which I am using locally and 852 is sql server 2016 according to:

http://bodnargabor.com/2018/04/17/sql-database-downgrade-internal-version-869-and-852-and-compatibility-level/

i also found out that once the local db file is upgraded to a higher version, you can't downgrade it anymore.

I couldn't find any hint in the umbraco docs, pointing out the used sql server version in the cloud.

As far as I got the documentation of umbraco cloud right, my changes are within the *.core project and pushed to github. all the files within the *.web project are gitignored. How do I get back the mdf file now in the right version, since all my changes also in the backoffice of umbraco were locally and not deployed to public instance.

thanks dee