while trying to upgrade from ojs-3.2.1-5 to ojs-3.3.0-19 i have encountered following error
ERROR: Upgrade failed: DB: SQLSTATE[22004]: Null value not allowed: 1138 Invalid use of NULL value (SQL: ALTER TABLE email_log CHANGE assoc_type assoc_type BIGINT NOT NULL, CHANGE assoc_id assoc_id BIGINT NOT NULL)
is it safe to delete ?
DELETE FROM email_log WHERE assoc_id IS NULL;
or
any other suggestions?
@asmecher please help
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