Mister Twister on "Edit tag ID"

So I've looked through MySQL, made some tests on clean Wordpress site and here is a solution of my question above:
First of all it's necessary to correct term_id value in wp_terms table. For example:
Before: term_id -> X
Later: term_id -> Y
Secondly you should correct the same term_id value in wp_term_taxonomy table. It's easy. For example:
Before: term_id -> X
Later: term_id -> Y
Don't change term_taxonomy_id value, otherwise all tags will became a mess in your posts.
That's it. Thank you for reading.