Strategic Model Account hierarchy disappearing without any action

Summary:

We created Strategic Model Memo Account hierarchy, created the childres as

v0300

v0300:A1

v0300:B1

when we migrate to another pod account number is changing as

v0300

v0300:a1

v0300:b1

whatever childrens we created under v0300:B1 also disappearing. What will be the solution to get back this. in original pod it looks good. but only when we migrate that envrironment having the issue

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