how to use gpart commit on ARM V7

[philo_neo71]

Hi,
only FreeBSD-11.0-CURRENT-arm-armv6-RPI2-20150826-r287169.img run !
I use with dd bs=1M if=FreeBSD-11.0-CURRENT-arm-armv6-RPI2-20150826-r287169.img of=/dev/da0, where /dev/da0 is my Micro SDcard with support SDcard USB connected at computer with FreeBSD 10.2.
The system boot but it's stop at this line <use gpart commit 'mmcsd0s2' to save change or 'gpart undo mmcsd0s2' to revert them.>.
I see well there operation do with gpart but i not sure to use the good parametres with gpart.
i try gpart commit da0 >> gpart: Operation not permitted

this is my output !

root@sta-viper:~ # gpart show da0
=>       63  131071937  da0  MBR  (63G)
         63     102375    1  !12  [active]  (50M)
     102438    1994714    2  freebsd  (974M)
    2097152  128974848       - free -  (62G)

root@sta-viper:~ # gpart commit mmcsd0s2
gpart: arg0 'mmcsd0s2': Invalid argument
root@sta-viper:~ # gpart commit da0
gpart: Operation not permitted
root@sta-viper:~ #

How can i do with gpart ?

Regards
Philippe