How to undo a Bulk Attribute Update?

[grant_sullivan]

Is there a way to undo a Bulk Attribute Update?  I accidentally did a Bulk update to all of the prices for all of my products via admin.  I went to Manage Products and ticked Select All thinking it was just the products on page 1 but it ended up being all my of 8742 products.  I went to Update Attributes and changed the Price, Special Price and Tax Class.  Now all of my product are all the same price which is wrong.  Can I undo this change?

[dipmegpro]

Hello  @grant_sullivan 

There is no admin configuration to undo this change. you need to update your database backup or re-import all your product prices. 

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