I wonder if anyone could help me with the final step to restoring a backup?

I created a project in the online trial of OpenProject  and have since installed OpenProject  locally in a Docker container on a PC running Windows 11 to carry on exploring.

I created a backup and downloaded the openproject.sql file. I copied it into OpenProject so now it shows:

openproject-# \dn
                       List of schemas
                       Name                           |  Owner
---------------------------------------------------------+----------
1738252715_4574683_4ce20049_316d_4cdd_a992_861268eefb2c | postgres
public                                                  | postgres
(2 rows)

the advice from https://www.openproject.org/docs/installation-and-operations/operation/restoring/#changing-the-database-schema-from-cloud-to-on-premises suggests:

openproject=# DROP SCHEMA public CASCADE; DROP SCHEMA

but when I run it I get:

openproject-# DROP SCHEMA public CASCADE; DROP SCHEMA
ERROR:  syntax error at or near "DROP"
LINE 3: DROP SCHEMA public CASCADE DROP SCHEMA
          ^

I'm not sure why - I noticed that the 'openproject=#' in the example is not the same as 'openproject-#' that I have. I'm also not sure why that is.

I wonder if you could give me any pointers? Any help gratefully received. Thanks, James