UM99901 that creates the ACFFDR for CA ACF2 was lost. Can it be recreated?

Document ID : KB000111146
Last Modified Date : 17/08/2018
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Question:
The UM99901 member that contains our site defined fields to the ACFFDR is missing.  How can it be re-created so we can make other updates to CA ACF2?
Answer:
Obviously a backup/restore is the easiest answer.  If that is not possible, then you have to go backwards using updated members.  This will take some work and is not an easy process.
 
SMPE adds all apars, ptfs, and usermods to library SMPPTS.  Member UM99901 will be in there.  There will be ++MAC and ++MACUPD that show what members are updated.  You may see some combination of these members updated:
 
ACF2.CAX1MAC0 

ACFCFDE 
ACFLID 
ACFXLID 
USERCFDE 
USERLID 
USERXLID 

ACF2.CAX1SRC0 

ACFFDR 
 
Using those updates make changes to UM99901 to re-create the member.