openwrt安装ppp-mod-pptp时，出现错误，无法安装

错误代码：
root@OpenWrt:~# opkg install ppp-mod-pptp
Installing ppp-mod-pptp (2.4.5-10) to root...
Downloading http://downloads.openwrt.org/snapshots/trunk/ramips/packages/ppp-mod -pptp_2.4.5-10_ramips_24kec.ipk.
Multiple packages (kmod-ppp and kmod-ppp) providing same name marked HOLD or PRE FER. Using latest.
Multiple packages (kmod-pppox and kmod-pppox) providing same name marked HOLD or PREFER. Using latest.
Multiple packages (kmod-ppp and kmod-ppp) providing same name marked HOLD or PRE FER. Using latest.
Multiple packages (kmod-crypto-core and kmod-crypto-core) providing same name ma rked HOLD or PREFER. Using latest.
Multiple packages (kmod-crypto-arc4 and kmod-crypto-arc4) providing same name ma rked HOLD or PREFER. Using latest.
Multiple packages (kmod-crypto-hash and kmod-crypto-hash) providing same name ma rked HOLD or PREFER. Using latest.
Multiple packages (kmod-crypto-core and kmod-crypto-core) providing same name ma rked HOLD or PREFER. Using latest.
Multiple packages (kmod-crypto-manager and kmod-crypto-manager) providing same n ame marked HOLD or PREFER. Using latest.
Multiple packages (kmod-crypto-core and kmod-crypto-core) providing same name ma rked HOLD or PREFER. Using latest.
Collected errors:
* satisfy_dependencies_for: Cannot satisfy the following dependencies for ppp-m od-pptp:
* kernel (= 3.10.26-1-fd6071bdd0e786375e8eb3045fa6cb4c) * kernel ( = 3.10.26-1-fd6071bdd0e786375e8eb3045fa6cb4c) * kernel (= 3.10.26-1-fd60 71bdd0e786375e8eb3045fa6cb4c) * kernel (= 3.10.26-1-fd6071bdd0e786375e8e b3045fa6cb4c) * kernel (= 3.10.26-1-fd6071bdd0e786375e8eb3045fa6cb4c) * kernel (= 3.10.26-1-fd6071bdd0e786375e8eb3045fa6cb4c) * kernel (= 3.10.2 6-1-fd6071bdd0e786375e8eb3045fa6cb4c) *
* opkg_install_cmd: Cannot install package ppp-mod-pptp.





我只能提供这么多了，求大神帮助，谢谢！