Unable to decrypt a Hard Drive using Safe Boot

My hard drive is encrypted using Safe Boot.
I am unable to decrypt it using the associated SDB file.
After checking the contents of the SDB file, I found the following messages: “
Auto Domain script using existing template because a new machine was trying to use its name.”
And this happened on "such and such a date."
Could this have changed the SDB file?
Is this the reason why the original drive can no longer use it?
