Update model with relation

[VnukA]

Hi,
I,m updating model with hasMany relation.
mysql query update relation example (id is AIPK)
DELETE FROM bibliography WHERE (item_id=13) AND (id<>NULL)
INSERT INTO bibliography (name, item_id, lock, created_at, updated_at, created_by, updated_by) VALUES ('anywhat', 13, 0, NOW(), NOW(), 1, 1)
But operator delete don't work correctly
explain DELETE FROM bibliography WHERE (item_id=13) AND (id<>NULL)
"id" "select_type" "table" "type" "possible_keys" "key" "key_len" "ref" "rows" "Extra"
"1" "SIMPLE" \N \N \N \N \N \N \N "Impossible WHERE"
row don't delete and insert duplicate entry with new PK
How to fix it?
Tnx

[alvarolordelo]

@VnukA take a look at
#138