Changed FK to M2M
CREATE TABLE `admissions_applicationdecisionoption_level` (
`id` integer AUTO_INCREMENT NOT NULL PRIMARY KEY,
`applicationdecisionoption_id` integer NOT NULL,
`admissionlevel_id` integer NOT NULL,
UNIQUE (`applicationdecisionoption_id`, `admissionlevel_id`)
)
;
insert into admissions_applicationdecisionoption_level (applicationdecisionoption_id, admissionlevel_id) select id, level_id from admissions_applicationdecisionoption where level_id is not null;