Strategic model custom accounts in not showing when we migrate models

Summary:

We created strategic model memo account hierarchy, and the child member's as

v0300

v0300:A1

v0300:B1

when we migrate this to another instance the account number is changing

v0300

v0300:a1

v0300:b1

and whatever the other children's we created under v0300:B1 accounts all accounts are missing, any solutions for this??