[1.7.x] Fixed #23892 -- Clarified compatibility policy for migrations.
[1.7.x] Fixed #23892 -- Clarified compatibility policy for migrations.

Backport of e35c70bef44805d47f6a4ae692be878184c4fe1f from master

oscaro/django,jyotsna1820/django,jyotsna1820/django,jyotsna1820/django,jyotsna1820/django,oscaro/django,oscaro/django,oscaro/django