Database in use by system, 50 on batch

I am doing a schema change on 8 for my test server. I start schema
change and i get a database status error 2623. It says wait or choose
cancel to stop, how long do I have to wait? I hit cancel, then it
reports the operation completed successfully with 0 errors, however
the database is not up to the program level which is 8.00.811,
database level is 8.00.700.

Thanks