[1.7.x] Fixed #22922: Better error message for InvalidBasesError.
[1.7.x] Fixed #22922: Better error message for InvalidBasesError.

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