Magento - orders with NULL values in DB

recently i've discovered that some orders in DB (sales_flat_order) have NULL values for all columns except: entity_id, protect_code, store_name, created_at, updated_at and total_item_count.

Those orders can be found via BO in Orders tab after applying DESC sorting.

First i thought that it may be connected when customer account is deleted, but it isn开发者_开发问答't. Second guess was directed towards multifront architecture... but in this case i don't have idea how it could happen.

Did You encountered such problem in your projects ?

Thanks.

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Never have encountered such before, do you have any 3rd party modules, or 3rd party code installed, if so I would start debugging and disabling modules. You may also look into your server configuration as well if you are doing any types of load balancing, caching, etc.

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Make sure your database / tables have InnoDB engine enabled