Can I transfer an EAD from one I-485 to another?

Waiting&Waiting

Registered Users (C)
I've obtained an EAD from an "employment-based I-485". Now, my wife is getting her citizenship real soon, and we've decided to file an "family-based I-485". Can I re-attach my EAD to the new I-485? Or do I have to apply for a new EAD? Please let me know. Thanks.
 
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