failure during database initialisation

The Debian package minerva_12.0.0~alpha.0_amd64.deb from the experimental suite is not usable. The reason seems to be a failure in database initialisation, the relevant lines from /var/log/minerva-install.log are:

psql:/usr/share/minerva/schema/db_0_to_12.0.0~alpha.0.sql:2603: ERROR:  syntax error at or near "CREATE"
LINE 3: CREATE SEQUENCE annotators_params_table_iddb_seq
        ^
psql:/usr/share/minerva/schema/db_0_to_12.0.0~alpha.0.sql:2616: ERROR:  relation "annotators_params_table_iddb_seq" does not exist

(the second error is from the initialisation of the table annotators_params_table)

As a consequence, normal minerva use is not possible, and the following can be found in the /var/log/tomcat7/catalina.out

(SqlExceptionHelper.java:144) - ERROR: relation "annotators_params_table" does not exist