Merge does not respect the threadid vbulletin

[3dpoder]

Merge does not respect the threadid number?

I have done the merge from vbulletin but the url ID is different:

vbulletin --> showthread.php?t=141301 Mybb -----> showthread.php?tid=107762

How can I redirect one to the other?

It is that if not, it would lose the google indexing of years.