At the top of the file, there is a note in abusefilter.tables.pg.sql.
abusefilter.tables.pg.sql
-- Note: This does not currently work, as the extension generates queries -- like this: SELECT af_hidden FROM abuse_filter WHERE af_id = 'new' LIMIT 1 -- Which makes no sense as af_id is a BIGINT in the MySQL version of the schema
Investigate if this is still truth, and if so, fix it.