(ok 2.11.7) new field cannot be autoincrement and PK

In a table with various fields, if you can insert a new one, type int, you cannot select auto_increment and primary key button at the same time
You get an error:
SQL query:
ALTER TABLE `Jefes` ADD `numID` INT( 5 ) NOT NULL AUTO_INCREMENT FIRST
MySQL said: Documentation
#1075 - Incorrect table definition; there can be only one auto column and it must be defined as a key

This happen with phpmyadmin 2.11.3, 2.11.4 and 2.11.5, but not with 2.11.2
I am using firefox 2.0.0.12, mysql 5.0.45, an MacOSX 10.4.11