Incorrect decimal value: '' for column `dbispconfig`.`spamfilter_policy`.`spam_dsn_cutoff_level` at row 1
Some of the default spamfilter_policy are created with spam_dsn_cutoff_level set to NULL, which creates error when editing:
Incorrect decimal value: '' for column `dbispconfig`.`spamfilter_policy`.`spam_dsn_cutoff_level` at row 1
https://www.howtoforge.com/community/threads/error-at-spam-policy-page.83922/