Linux source not found

[isabelle1208]

Hi~
I have installed kernel-devel, and I run uname -a,
Linux localhost.localdomain 3.10.0-514.el7.x86_64 #1 SMP Tue Nov 22 16:42:41 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux.
However, when i run ./configure, it shows that:
Kernel version: 3.10.0-514.el7.x86_64 (uname)
! Linux source not found. Don't panic. You may specify kernel source
! directory with --kdir=..., or try to install kernel-devel package,
! or just raw sources for linux-3.10.0-514.el7.x86_64 from kernel.org.
!
! Under Centos simply run this:
! root# yum install kernel-devel iptables-devel.x86_64 pkgconfig

Can you help me ? please !

[aabc]

Hi, It may be that you installed kernel-devel package for different kernel version than you running. Try running rpm -qa 'kernel*' to see if versions align. You also may upgrade kernel and kernel-devel to the latest version and reboot.

[isabelle1208]

[root@localhost ipt-netflow-master]# rpm -qa 'kernel*'
kernel-3.10.0-862.3.2.el7.x86_64
kernel-devel-3.10.0-862.3.2.el7.x86_64
kernel-3.10.0-514.el7.x86_64
kernel-headers-3.10.0-693.2.2.el7.x86_64
kernel-tools-3.10.0-514.el7.x86_64
kernel-tools-libs-3.10.0-514.el7.x86_64

Yes. There are differents versions. Should I update kernel and kernel-devel ? At the same time, must I remove previous versions ?

[aabc]

Yes. No.