This line consists of an accession number and a version number, like "AB123456.1", in which the digit(s) after the period is a version number.
The data open to public for the first time is version number as "1". The reason for adding VERSION is that since a released sequence sometimes revised by the submitter, the accession number alone cannot specify the sequence in question causing the user a trouble. The number is increased by one every time when a revised sequence is made public. And accession number will NOT be changed generally.
example VERSION AB000000.1
This line consists of a number assigned to a resources unit in which the digit(s) after the period is a version number.
Since the sequence of an MGA entry is not allowed to update, the version number has to be "1".
example VERSION ZZZZZ0000000.1