OJS 3.2 to 3.3 Upgrade

I have installed OJS 3.2 and want to upgrade it on 3.3 but it gives the error
SQLSTATE[42S01]: Base table or view already exists: 1050 Table ‘announcement_types’ already exists (SQL: create table announcement_types (type_id bigint not null auto_increment primary key, assoc_type smallint not null, assoc_id bigint not null) default character set utf8 collate ‘utf8_general_ci’)
please help me to resolve it

I can suggest a read at
Problem with upgrading to ojs 3-3-0-3

I am also facing same error can you help me ?