- 
    Bug 
- 
    Resolution: Fixed
- 
    Major 
- 
    3.0.12, 3.1.0-a3
- 
    None
if (isset($prepared_column['auto_increment']) && strlen($column_name) > 26)
Should be:
if (isset($prepared_column['auto_increment']) && $prepared_column['auto_increment'] && strlen($column_name) > 26)

